TY  - JOUR
AU  - Ušćumlić, Gordana
AU  - Nikolić, Jasmina
AU  - Krstić, Vera V.
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/729
AB  - The rate constants for the reaction of diazodiphenylinethane with 2-substituted cyclohex-1-enylcarboxylic acids, determined in butan-1-ol, 2-methylpropan-1-ol and ethylene glycol, together with the rate constants determined previously in methanol, ethanol, propan-1-ol and propan-2-ol, are correlated using the total solvtochromic equation, of the form log k = A(o) + s pi* + a alpha + b beta the two parameter model log k =A(o)+ s pi* + a alpha and the single parameter model log k = A(o) + b beta, where pi*, beta and alpha represent the solvent dipolarity/polarizability, solvent hydrogen bond acceptor basicity and hydrogen bond donor acidity, respectively. The correlation of the kinetic data are carried Out by means of multiple linear regression analysis and solvent effects on the reaction rates have been analysed in terms of initial state and transition state contributions. The results obtained for 2-substituted cyclohex-1-enylcarboxylic acids are compared with the results for 2-subsituted benzoic acids under the same experimental conditions.
PB  - Natl Inst Science Communication, New Delhi
T2  - Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry
T1  - Hydroxylic solvent effects on the reaction rates of diazodiphenyl methane with 2-substituted cyclohex-1-enylcarboxylic and 2-substituted benzoic acids: Part II
EP  - 1287
IS  - 6
SP  - 1283
VL  - 44
UR  - https://hdl.handle.net/21.15107/rcub_technorep_729
ER  - 

@article{
author = "Ušćumlić, Gordana and Nikolić, Jasmina and Krstić, Vera V.",
year = "2005",
abstract = "The rate constants for the reaction of diazodiphenylinethane with 2-substituted cyclohex-1-enylcarboxylic acids, determined in butan-1-ol, 2-methylpropan-1-ol and ethylene glycol, together with the rate constants determined previously in methanol, ethanol, propan-1-ol and propan-2-ol, are correlated using the total solvtochromic equation, of the form log k = A(o) + s pi* + a alpha + b beta the two parameter model log k =A(o)+ s pi* + a alpha and the single parameter model log k = A(o) + b beta, where pi*, beta and alpha represent the solvent dipolarity/polarizability, solvent hydrogen bond acceptor basicity and hydrogen bond donor acidity, respectively. The correlation of the kinetic data are carried Out by means of multiple linear regression analysis and solvent effects on the reaction rates have been analysed in terms of initial state and transition state contributions. The results obtained for 2-substituted cyclohex-1-enylcarboxylic acids are compared with the results for 2-subsituted benzoic acids under the same experimental conditions.",
publisher = "Natl Inst Science Communication, New Delhi",
journal = "Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry",
title = "Hydroxylic solvent effects on the reaction rates of diazodiphenyl methane with 2-substituted cyclohex-1-enylcarboxylic and 2-substituted benzoic acids: Part II",
pages = "1287-1283",
number = "6",
volume = "44",
url = "https://hdl.handle.net/21.15107/rcub_technorep_729"
}

Ušćumlić, G., Nikolić, J.,& Krstić, V. V.. (2005). Hydroxylic solvent effects on the reaction rates of diazodiphenyl methane with 2-substituted cyclohex-1-enylcarboxylic and 2-substituted benzoic acids: Part II. in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry
Natl Inst Science Communication, New Delhi., 44(6), 1283-1287.
https://hdl.handle.net/21.15107/rcub_technorep_729

Ušćumlić G, Nikolić J, Krstić VV. Hydroxylic solvent effects on the reaction rates of diazodiphenyl methane with 2-substituted cyclohex-1-enylcarboxylic and 2-substituted benzoic acids: Part II. in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry. 2005;44(6):1283-1287.
https://hdl.handle.net/21.15107/rcub_technorep_729 .

Ušćumlić, Gordana, Nikolić, Jasmina, Krstić, Vera V., "Hydroxylic solvent effects on the reaction rates of diazodiphenyl methane with 2-substituted cyclohex-1-enylcarboxylic and 2-substituted benzoic acids: Part II" in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 44, no. 6 (2005):1283-1287,
https://hdl.handle.net/21.15107/rcub_technorep_729 .

TY  - JOUR
AU  - Nikolić, Jasmina
AU  - Ušćumlić, Gordana
AU  - Krstić, Vera V.
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/819
AB  - The rate constants for the reaction of different cycloalkenylcarboxylic, cycloalkenylacetic acids, and phenylacetic acid with diazodiphenylmethane were determined in 12 aprotic solvents at 30 degrees C. in order to explain the kinetic results through solvent effects, the second-order rate constant of the examined acids was correlated using the Kamlet-Taft solvatochromic equation. The correlations of the kinetic data were carried out by means of multiple linear regression analysis, and the solvent effects on the reaction rates were analyzed in terms of initial and transition state contributions. The opposite signs of the electrophilic and the nucleophilic parameters are in agreement with the well-known mechanism of the reaction of carboxylic acids with diazodiphenylmethane. The quantitative relationship between the molecular structure and the chemical reactivity is also discussed.
PB  - Wiley, Hoboken
T2  - International Journal of Chemical Kinetics
T1  - Solvent and structural effects on the kinetics of the reactions of cycloalkenylcarboxylic and cycloalkenylacetic acids with diazodiphenylmethane
EP  - 367
IS  - 6
SP  - 361
VL  - 37
DO  - 10.1002/kin.20083
ER  - 

@article{
author = "Nikolić, Jasmina and Ušćumlić, Gordana and Krstić, Vera V.",
year = "2005",
abstract = "The rate constants for the reaction of different cycloalkenylcarboxylic, cycloalkenylacetic acids, and phenylacetic acid with diazodiphenylmethane were determined in 12 aprotic solvents at 30 degrees C. in order to explain the kinetic results through solvent effects, the second-order rate constant of the examined acids was correlated using the Kamlet-Taft solvatochromic equation. The correlations of the kinetic data were carried out by means of multiple linear regression analysis, and the solvent effects on the reaction rates were analyzed in terms of initial and transition state contributions. The opposite signs of the electrophilic and the nucleophilic parameters are in agreement with the well-known mechanism of the reaction of carboxylic acids with diazodiphenylmethane. The quantitative relationship between the molecular structure and the chemical reactivity is also discussed.",
publisher = "Wiley, Hoboken",
journal = "International Journal of Chemical Kinetics",
title = "Solvent and structural effects on the kinetics of the reactions of cycloalkenylcarboxylic and cycloalkenylacetic acids with diazodiphenylmethane",
pages = "367-361",
number = "6",
volume = "37",
doi = "10.1002/kin.20083"
}

Nikolić, J., Ušćumlić, G.,& Krstić, V. V.. (2005). Solvent and structural effects on the kinetics of the reactions of cycloalkenylcarboxylic and cycloalkenylacetic acids with diazodiphenylmethane. in International Journal of Chemical Kinetics
Wiley, Hoboken., 37(6), 361-367.
https://doi.org/10.1002/kin.20083

Nikolić J, Ušćumlić G, Krstić VV. Solvent and structural effects on the kinetics of the reactions of cycloalkenylcarboxylic and cycloalkenylacetic acids with diazodiphenylmethane. in International Journal of Chemical Kinetics. 2005;37(6):361-367.
doi:10.1002/kin.20083 .

Nikolić, Jasmina, Ušćumlić, Gordana, Krstić, Vera V., "Solvent and structural effects on the kinetics of the reactions of cycloalkenylcarboxylic and cycloalkenylacetic acids with diazodiphenylmethane" in International Journal of Chemical Kinetics, 37, no. 6 (2005):361-367,
https://doi.org/10.1002/kin.20083 . .

TY  - JOUR
AU  - Nikolić, Jasmina
AU  - Ušćumlić, Gordana
AU  - Krstić, Vera V.
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/686
AB  - The rate constants for the reaction of diazodiphenylmethane with 2-(2-substituted cyclohex-1-enyl)acetic acids and 2-(2-substituted phenyl)acetic acids, previously determined in seven hydroxylic solvents, were correlated using the total solvatochromic equation, of the form logk = logk0 + s¶*+ aα + bβ, the two-parameter model, logk=logk0 + s¶*+ aα and a single parameter model logk = logk0 + bβ, where ¶*is a measure of the solvent polarity, α represents the scale of solvent hydrogen bond acceptor basicities and β represents the scale of solvent hydrogen bond donor acidities. The correlations of the kinetic data were carried out by means of multiple linear regression analysis and the solvent effects on the reaction rates were analyzed in terms of initial state and transition state contributions.
AB  - Konstante brzina za reakciju između diazodifenilmetana i 2-(2-supstituisanih cikloheksen-1-enil)sirćetnih i 2-(2-supstituisanih fenil)sirćetnih kiselina prethodno određene u sedam alkoholnih rastvarača na 30 ºC, korelisane su totalnom solvatohromnom jednačinom oblika: logk = logk0 + s¶*+ aα + bβ kao i dvoparametarskom logk=logk0 + s¶*+ aα i jednoparametarskom logk = logk0 + bβ, gde je ¶*mera polarnosti rastvarača, α predstavlja skalu baznosti rastvarača kao akceptora protona u vodoničnoj vezi, β skalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacija kinetičkih parametara je izvršena metodom višestruke linearne regresione analize. Suprotni znaci uz elektrofilni i nukleofilni parametar su u skladu sa navedenim reakcionim mehanizmom. Slaganje eksperimentalno određenih konstanti brzina sa izračunatim vrednostima je potvrda ispravnosti primenjenog modela. Rezultati prikazani u ovom radu omogućuju kvantitativno razdvajanje i procenu ukupnih efekata rastvarača na polazno i prelazno stanje u reakciji karbonskih kiselina sa DDM-om u alkoholnim rastvaračima.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - The influence of the solvent on organic reactivity. Part II. Hydroxylic solvent effects on the reaction rates of diazodiphenylmethane with 2-(2-substituted cyclohex-1-enyl)acetic and 2-(2-substituted phenyl)acetic acid
T1  - Uticaj hidroksilnih rastvarača na brzinu reakcije diazodifenilmetana Sa 2-(2-supstituisanim cikloheks-1-enil)sirćetnim i 2-(2-supstituisanim fenil)sirćetnim kiselinama
EP  - 610
IS  - 8-9
SP  - 601
VL  - 69
UR  - https://hdl.handle.net/21.15107/rcub_technorep_686
ER  - 

@article{
author = "Nikolić, Jasmina and Ušćumlić, Gordana and Krstić, Vera V.",
year = "2004",
abstract = "The rate constants for the reaction of diazodiphenylmethane with 2-(2-substituted cyclohex-1-enyl)acetic acids and 2-(2-substituted phenyl)acetic acids, previously determined in seven hydroxylic solvents, were correlated using the total solvatochromic equation, of the form logk = logk0 + s¶*+ aα + bβ, the two-parameter model, logk=logk0 + s¶*+ aα and a single parameter model logk = logk0 + bβ, where ¶*is a measure of the solvent polarity, α represents the scale of solvent hydrogen bond acceptor basicities and β represents the scale of solvent hydrogen bond donor acidities. The correlations of the kinetic data were carried out by means of multiple linear regression analysis and the solvent effects on the reaction rates were analyzed in terms of initial state and transition state contributions., Konstante brzina za reakciju između diazodifenilmetana i 2-(2-supstituisanih cikloheksen-1-enil)sirćetnih i 2-(2-supstituisanih fenil)sirćetnih kiselina prethodno određene u sedam alkoholnih rastvarača na 30 ºC, korelisane su totalnom solvatohromnom jednačinom oblika: logk = logk0 + s¶*+ aα + bβ kao i dvoparametarskom logk=logk0 + s¶*+ aα i jednoparametarskom logk = logk0 + bβ, gde je ¶*mera polarnosti rastvarača, α predstavlja skalu baznosti rastvarača kao akceptora protona u vodoničnoj vezi, β skalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacija kinetičkih parametara je izvršena metodom višestruke linearne regresione analize. Suprotni znaci uz elektrofilni i nukleofilni parametar su u skladu sa navedenim reakcionim mehanizmom. Slaganje eksperimentalno određenih konstanti brzina sa izračunatim vrednostima je potvrda ispravnosti primenjenog modela. Rezultati prikazani u ovom radu omogućuju kvantitativno razdvajanje i procenu ukupnih efekata rastvarača na polazno i prelazno stanje u reakciji karbonskih kiselina sa DDM-om u alkoholnim rastvaračima.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "The influence of the solvent on organic reactivity. Part II. Hydroxylic solvent effects on the reaction rates of diazodiphenylmethane with 2-(2-substituted cyclohex-1-enyl)acetic and 2-(2-substituted phenyl)acetic acid, Uticaj hidroksilnih rastvarača na brzinu reakcije diazodifenilmetana Sa 2-(2-supstituisanim cikloheks-1-enil)sirćetnim i 2-(2-supstituisanim fenil)sirćetnim kiselinama",
pages = "610-601",
number = "8-9",
volume = "69",
url = "https://hdl.handle.net/21.15107/rcub_technorep_686"
}

Nikolić, J., Ušćumlić, G.,& Krstić, V. V.. (2004). The influence of the solvent on organic reactivity. Part II. Hydroxylic solvent effects on the reaction rates of diazodiphenylmethane with 2-(2-substituted cyclohex-1-enyl)acetic and 2-(2-substituted phenyl)acetic acid. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 69(8-9), 601-610.
https://hdl.handle.net/21.15107/rcub_technorep_686

Nikolić J, Ušćumlić G, Krstić VV. The influence of the solvent on organic reactivity. Part II. Hydroxylic solvent effects on the reaction rates of diazodiphenylmethane with 2-(2-substituted cyclohex-1-enyl)acetic and 2-(2-substituted phenyl)acetic acid. in Journal of the Serbian Chemical Society. 2004;69(8-9):601-610.
https://hdl.handle.net/21.15107/rcub_technorep_686 .

Nikolić, Jasmina, Ušćumlić, Gordana, Krstić, Vera V., "The influence of the solvent on organic reactivity. Part II. Hydroxylic solvent effects on the reaction rates of diazodiphenylmethane with 2-(2-substituted cyclohex-1-enyl)acetic and 2-(2-substituted phenyl)acetic acid" in Journal of the Serbian Chemical Society, 69, no. 8-9 (2004):601-610,
https://hdl.handle.net/21.15107/rcub_technorep_686 .

TY  - JOUR
AU  - Nikolić, Jasmina
AU  - Ušćumlić, Gordana
AU  - Krstić, Vera V.
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/710
AB  - The rate constants for the reaction of diazodiphenylmethane with cyclohexylcarboxylic, cyclopentylcarboxylic, cyclohex-3-enylcarboxylic and cyclopent-3-enylcarboxylic acids have been determined in ten alcohols at 30degreesC using the UV-spectroscopic method. In order to explain the kinetic results through solvent effects, the second order rate constants of the examined acids are correlated using the total solvatochromic equation, of the form: log k = A(0) sn* + aalpha + bbeta, where pi*, beta and alpha represent the solvent dipolarity/polarizability, solvent hydrogen bond acceptor basicities and hydrogen bond donor acidities, respectively. The correlation of the kinetic data were carried out by means of multiple linear regression analysis and solvent effects on the reaction rates have been analysed in terms of the initial state and the transition state contributions.
PB  - Natl Inst Science Communication, New Delhi
T2  - Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry
T1  - The influence of the hydroxylic solvents on the reaction rates of diazodiphenylmethane with cycloalkylcarboxylic and cycloalkenylcarboxylic acids
EP  - 2000
IS  - 9
SP  - 1995
VL  - 43
UR  - https://hdl.handle.net/21.15107/rcub_technorep_710
ER  - 

@article{
author = "Nikolić, Jasmina and Ušćumlić, Gordana and Krstić, Vera V.",
year = "2004",
abstract = "The rate constants for the reaction of diazodiphenylmethane with cyclohexylcarboxylic, cyclopentylcarboxylic, cyclohex-3-enylcarboxylic and cyclopent-3-enylcarboxylic acids have been determined in ten alcohols at 30degreesC using the UV-spectroscopic method. In order to explain the kinetic results through solvent effects, the second order rate constants of the examined acids are correlated using the total solvatochromic equation, of the form: log k = A(0) sn* + aalpha + bbeta, where pi*, beta and alpha represent the solvent dipolarity/polarizability, solvent hydrogen bond acceptor basicities and hydrogen bond donor acidities, respectively. The correlation of the kinetic data were carried out by means of multiple linear regression analysis and solvent effects on the reaction rates have been analysed in terms of the initial state and the transition state contributions.",
publisher = "Natl Inst Science Communication, New Delhi",
journal = "Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry",
title = "The influence of the hydroxylic solvents on the reaction rates of diazodiphenylmethane with cycloalkylcarboxylic and cycloalkenylcarboxylic acids",
pages = "2000-1995",
number = "9",
volume = "43",
url = "https://hdl.handle.net/21.15107/rcub_technorep_710"
}

Nikolić, J., Ušćumlić, G.,& Krstić, V. V.. (2004). The influence of the hydroxylic solvents on the reaction rates of diazodiphenylmethane with cycloalkylcarboxylic and cycloalkenylcarboxylic acids. in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry
Natl Inst Science Communication, New Delhi., 43(9), 1995-2000.
https://hdl.handle.net/21.15107/rcub_technorep_710

Nikolić J, Ušćumlić G, Krstić VV. The influence of the hydroxylic solvents on the reaction rates of diazodiphenylmethane with cycloalkylcarboxylic and cycloalkenylcarboxylic acids. in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry. 2004;43(9):1995-2000.
https://hdl.handle.net/21.15107/rcub_technorep_710 .

Nikolić, Jasmina, Ušćumlić, Gordana, Krstić, Vera V., "The influence of the hydroxylic solvents on the reaction rates of diazodiphenylmethane with cycloalkylcarboxylic and cycloalkenylcarboxylic acids" in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 43, no. 9 (2004):1995-2000,
https://hdl.handle.net/21.15107/rcub_technorep_710 .

TY  - JOUR
AU  - Ušćumlić, Gordana
AU  - Nikolić, Jasmina
AU  - Krstić, Vera V.
PY  - 2002
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/489
AB  - The rate constants for the reaction of diazodiphenylmethane with 1-cyclopentenecarboxylic, 1-cycloheptenecarboxylic, cyclopent-1-enylacetic and cyclohept-1-enylacetic acids were determined in eight alcohols at 30 ºC using the appropriate UV-spectroscopic method. In order to explain the kinetic results through solvent effects, the second order rate constants of the examined acids were correlated using a total solvatochromic equation, of the form: log k = A0+ s¶*+aα+ bβ, where ¶* is a measure of the solvent polarity, βrepresents the scale of solvent hydrogen bond acceptor basicities and β represents the scale of solvent hydrogen bond donor acidities. The correlations of the kinetic data were carried out by means of multiple linear regression analysis. The opposite sings of the electrophilic and the nucleophilic parameters are in agreement with the well-known reaction mechanism. The results presented in this paper were compared with the kinetic data for 1-cyclohexenecarboxylic and cyclohex-1-enylacetic acids obtained under the same experimental conditions.
AB  - Konstante brzina za reakciju između diazodifenilmetana (DDM) i 1-ciklopentenkarbonske, 1-cikloheptenkarbonske, ciklopent-1-enilsirćetne i ciklohept-1-enilsirćetne kiseline su određene u osam alkoholnih rastvarača na 30 ºC odgovarajućim UV-spektrofotometrijskim metodom. Da bi se dobijeni kinetički rezultati objasnili kroz efekte rastvarača konstante brizna reakcije (k) su korelisane totalnom solvatohromnom jednačinom oblika: log k = A0+ s¶*+aα+ bβ, gde je ¶* mera polarnosti rastvarača, βpredstavlja skalu baznosti rastvarača kao akceptora protona u vodoničnoj vezi, a αskalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacija kinetičkih parametara je izvršena metodom višestruke linearne regresione analize. Suprotni znaci uz elektrofilni i nukleofilni parametear u saglasnosti su sa izvedenim mehanizmom reakcije. Rezultati prikazani u ovom radu su upoređeni sa kinetičkim podacima za 1-cikloheksenkarbonsku i cikloheks-1-enilsirćetnu kiselinu, dobijenim pod istim eksperimentalnim uslovima.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - The reactivity of α,β-unsaturated carboxylic acids. Part XVI. The kinetics of the reaction of cycloalkenecarboxylic and cycloalkenylacetic acids with diazodiphenylmethane in various alcohols
T1  - Reaktivnost α,β-nezasićenih kiselina. Deo XVI. Kinetika reakcije cikloalkenilkarbonskih i cikloalkenilsirćetnih kiselina sa diazodifenilmetanom u različitim alkoholima
EP  - 85
IS  - 2
SP  - 77
VL  - 67
UR  - https://hdl.handle.net/21.15107/rcub_technorep_489
ER  - 

@article{
author = "Ušćumlić, Gordana and Nikolić, Jasmina and Krstić, Vera V.",
year = "2002",
abstract = "The rate constants for the reaction of diazodiphenylmethane with 1-cyclopentenecarboxylic, 1-cycloheptenecarboxylic, cyclopent-1-enylacetic and cyclohept-1-enylacetic acids were determined in eight alcohols at 30 ºC using the appropriate UV-spectroscopic method. In order to explain the kinetic results through solvent effects, the second order rate constants of the examined acids were correlated using a total solvatochromic equation, of the form: log k = A0+ s¶*+aα+ bβ, where ¶* is a measure of the solvent polarity, βrepresents the scale of solvent hydrogen bond acceptor basicities and β represents the scale of solvent hydrogen bond donor acidities. The correlations of the kinetic data were carried out by means of multiple linear regression analysis. The opposite sings of the electrophilic and the nucleophilic parameters are in agreement with the well-known reaction mechanism. The results presented in this paper were compared with the kinetic data for 1-cyclohexenecarboxylic and cyclohex-1-enylacetic acids obtained under the same experimental conditions., Konstante brzina za reakciju između diazodifenilmetana (DDM) i 1-ciklopentenkarbonske, 1-cikloheptenkarbonske, ciklopent-1-enilsirćetne i ciklohept-1-enilsirćetne kiseline su određene u osam alkoholnih rastvarača na 30 ºC odgovarajućim UV-spektrofotometrijskim metodom. Da bi se dobijeni kinetički rezultati objasnili kroz efekte rastvarača konstante brizna reakcije (k) su korelisane totalnom solvatohromnom jednačinom oblika: log k = A0+ s¶*+aα+ bβ, gde je ¶* mera polarnosti rastvarača, βpredstavlja skalu baznosti rastvarača kao akceptora protona u vodoničnoj vezi, a αskalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacija kinetičkih parametara je izvršena metodom višestruke linearne regresione analize. Suprotni znaci uz elektrofilni i nukleofilni parametear u saglasnosti su sa izvedenim mehanizmom reakcije. Rezultati prikazani u ovom radu su upoređeni sa kinetičkim podacima za 1-cikloheksenkarbonsku i cikloheks-1-enilsirćetnu kiselinu, dobijenim pod istim eksperimentalnim uslovima.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "The reactivity of α,β-unsaturated carboxylic acids. Part XVI. The kinetics of the reaction of cycloalkenecarboxylic and cycloalkenylacetic acids with diazodiphenylmethane in various alcohols, Reaktivnost α,β-nezasićenih kiselina. Deo XVI. Kinetika reakcije cikloalkenilkarbonskih i cikloalkenilsirćetnih kiselina sa diazodifenilmetanom u različitim alkoholima",
pages = "85-77",
number = "2",
volume = "67",
url = "https://hdl.handle.net/21.15107/rcub_technorep_489"
}

Ušćumlić, G., Nikolić, J.,& Krstić, V. V.. (2002). The reactivity of α,β-unsaturated carboxylic acids. Part XVI. The kinetics of the reaction of cycloalkenecarboxylic and cycloalkenylacetic acids with diazodiphenylmethane in various alcohols. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 67(2), 77-85.
https://hdl.handle.net/21.15107/rcub_technorep_489

Ušćumlić G, Nikolić J, Krstić VV. The reactivity of α,β-unsaturated carboxylic acids. Part XVI. The kinetics of the reaction of cycloalkenecarboxylic and cycloalkenylacetic acids with diazodiphenylmethane in various alcohols. in Journal of the Serbian Chemical Society. 2002;67(2):77-85.
https://hdl.handle.net/21.15107/rcub_technorep_489 .

Ušćumlić, Gordana, Nikolić, Jasmina, Krstić, Vera V., "The reactivity of α,β-unsaturated carboxylic acids. Part XVI. The kinetics of the reaction of cycloalkenecarboxylic and cycloalkenylacetic acids with diazodiphenylmethane in various alcohols" in Journal of the Serbian Chemical Society, 67, no. 2 (2002):77-85,
https://hdl.handle.net/21.15107/rcub_technorep_489 .

TY  - JOUR
AU  - Nikolić, Jasmina
AU  - Ušćumlić, Gordana
AU  - Krstić, Vera V.
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/285
AB  - Rate constants for the reaction of diazodiphenylmethane with cyclohex-1-enylcarboxylic acid and 2-methylcyclohex-1-enylcarboxylic acid were determined in nine aprotic solvents, as well as in seven protic solvents, at 30 ºC using the appropriate UV-spectroscopic method. In protic solvents the unsubsituted acid displayed higher reaction rates than the methyl-substituted one. The results in aprotic solvents showed quite the opposite, and the reaction rates were considerably lower. In order to explain the obtained results through solvent effects, reaction rate constants (k) of the examined acids were correlated using the total solvatochromic equation of the form: log k = log k0 + sπ* + aα + bβ, where π* is the measure of the solvent polarity, α represents the scale of the solvent hydrogen bond donor acidities (HBD) and β represents the scale of the solvent hydrogen bond acceptor basicities (HBA). The correlation of the kinetic data were carried out by means of multiple linear regression analysis and the opposite effects of aprotic solvents, as well as the difference in the influence of protic and aprotic solvents on the reaction of the two examined acids with DDM were discussed. The results presented in this paper for cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids were compared with the kinetic data for benzoic acid obtained in the same chemical reaction, under the same experimental conditions. .
AB  - Konstante brzine za reakciju između diazodifenilmetana (DDM) i cikloheks-1-enilkarbonske, kao i 2-methilcikloheks-1-enilkarbonske kiseline su određene u devet aprotičnih i sedam protičnih rastvarača, odgovarajućom UV-spektrofotometrijskom metodom. U protičnim rastvaračima nesupstituisana kiselina je pokazala veće reakcione brzine od supstituisane. Rezultati u aprotičnim rastvaračima su pokazali upravo suprotno i brzine su znatno manje. Da bi se dobijeni rezultati objasnili kroz efekte rastvarača, konstante brzine reakcije (k) su korelisane totalnom solvatohromnom jednačinom oblika: log k = log k0 + sπ* + aα + bβ, gde je π* mera polarnosti rastvarača, α predstavlja skalu baznosti rastvarača kao akceptora protona u vodoničnoj vezi, a β predstavlja skalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacija kinetičkih podataka je izvršena metodom multiple linearne regresije i razmatrani su suprotni efekti aprotičnih rastvarača, kao i razlika u uticaju protičnih i aprotičnih rastvarača na reakciju dve ispitivane kiseline i DDM-a. Rezultati prikazani u ovom radu za cikloheks-1-enilkarbonsku i 2-methil-cikloheks-1-enilkarbonsku kiselinu su upoređeni sa kinetičkim podacima za benzoevu kiselinu, dobijenim u istoj hemijskoj reakciji pod istim eksperimentalnim uslovima. .
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Reactivity of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids with diazodiphenylmethane in aprotic solvents
T1  - Reaktivnost cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiseline sa diazodifenilmetanom u aprotičnim rastvaračima
EP  - 846
IS  - 12
SP  - 839
VL  - 65
UR  - https://hdl.handle.net/21.15107/rcub_technorep_285
ER  - 

@article{
author = "Nikolić, Jasmina and Ušćumlić, Gordana and Krstić, Vera V.",
year = "2000",
abstract = "Rate constants for the reaction of diazodiphenylmethane with cyclohex-1-enylcarboxylic acid and 2-methylcyclohex-1-enylcarboxylic acid were determined in nine aprotic solvents, as well as in seven protic solvents, at 30 ºC using the appropriate UV-spectroscopic method. In protic solvents the unsubsituted acid displayed higher reaction rates than the methyl-substituted one. The results in aprotic solvents showed quite the opposite, and the reaction rates were considerably lower. In order to explain the obtained results through solvent effects, reaction rate constants (k) of the examined acids were correlated using the total solvatochromic equation of the form: log k = log k0 + sπ* + aα + bβ, where π* is the measure of the solvent polarity, α represents the scale of the solvent hydrogen bond donor acidities (HBD) and β represents the scale of the solvent hydrogen bond acceptor basicities (HBA). The correlation of the kinetic data were carried out by means of multiple linear regression analysis and the opposite effects of aprotic solvents, as well as the difference in the influence of protic and aprotic solvents on the reaction of the two examined acids with DDM were discussed. The results presented in this paper for cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids were compared with the kinetic data for benzoic acid obtained in the same chemical reaction, under the same experimental conditions. ., Konstante brzine za reakciju između diazodifenilmetana (DDM) i cikloheks-1-enilkarbonske, kao i 2-methilcikloheks-1-enilkarbonske kiseline su određene u devet aprotičnih i sedam protičnih rastvarača, odgovarajućom UV-spektrofotometrijskom metodom. U protičnim rastvaračima nesupstituisana kiselina je pokazala veće reakcione brzine od supstituisane. Rezultati u aprotičnim rastvaračima su pokazali upravo suprotno i brzine su znatno manje. Da bi se dobijeni rezultati objasnili kroz efekte rastvarača, konstante brzine reakcije (k) su korelisane totalnom solvatohromnom jednačinom oblika: log k = log k0 + sπ* + aα + bβ, gde je π* mera polarnosti rastvarača, α predstavlja skalu baznosti rastvarača kao akceptora protona u vodoničnoj vezi, a β predstavlja skalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacija kinetičkih podataka je izvršena metodom multiple linearne regresije i razmatrani su suprotni efekti aprotičnih rastvarača, kao i razlika u uticaju protičnih i aprotičnih rastvarača na reakciju dve ispitivane kiseline i DDM-a. Rezultati prikazani u ovom radu za cikloheks-1-enilkarbonsku i 2-methil-cikloheks-1-enilkarbonsku kiselinu su upoređeni sa kinetičkim podacima za benzoevu kiselinu, dobijenim u istoj hemijskoj reakciji pod istim eksperimentalnim uslovima. .",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Reactivity of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids with diazodiphenylmethane in aprotic solvents, Reaktivnost cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiseline sa diazodifenilmetanom u aprotičnim rastvaračima",
pages = "846-839",
number = "12",
volume = "65",
url = "https://hdl.handle.net/21.15107/rcub_technorep_285"
}

Nikolić, J., Ušćumlić, G.,& Krstić, V. V.. (2000). Reactivity of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids with diazodiphenylmethane in aprotic solvents. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 65(12), 839-846.
https://hdl.handle.net/21.15107/rcub_technorep_285

Nikolić J, Ušćumlić G, Krstić VV. Reactivity of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids with diazodiphenylmethane in aprotic solvents. in Journal of the Serbian Chemical Society. 2000;65(12):839-846.
https://hdl.handle.net/21.15107/rcub_technorep_285 .

Nikolić, Jasmina, Ušćumlić, Gordana, Krstić, Vera V., "Reactivity of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids with diazodiphenylmethane in aprotic solvents" in Journal of the Serbian Chemical Society, 65, no. 12 (2000):839-846,
https://hdl.handle.net/21.15107/rcub_technorep_285 .

TY  - JOUR
AU  - Nikolić, Jasmina
AU  - Ušćumlić, Gordana
AU  - Krstić, Vera V.
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/289
AB  - The ultraviolet absorption spectra of cyclohex-1-enylcarboxylic acid and 2-methylcyclohex-1-enylcarboxylic acid were determined in six protic and nine aprotic solvents in the wavelength range from 200 to 400 nm. The position of the λmax of the two examined acids showed that the ultraviolet absorption maximums of cyclohex-1-enylcarboxylic acid were at consistently longer wavelengths in protic solvents than those of methylcyclohex-1-enylcarboxylic acid. The opposite was true in aprotic solvents. In order to explain the obtained results, the ultraviolet absorption frequencies of the electronic transitions in the carboxy carbonyl group of the examined acids were correlated using a total solvatochromic equation of the form: ν = ν0 + sπ* + aα + bβ, where π* is a measure of the solvent polarity, β represents the scale of solvent hydrogen bond acceptor basicities and α represents the scale of solvent hydrogen bond donor acidities. The correlation of the spectroscopic data was carried out by means of multiple linear regression analysis. The opposing solvent effects on the ultraviolet absorption maximums of the two examined acids were discussed.
AB  - Ultraljubičasti apsorpcioni spektri cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiseline su određeni u šest protičnih i devet aprotičnih rastvarača u opsegu talasnih dužina od 200 do 400 nm. Položaj λmax za ispitivane kiseline pokazao je da su apsorpcioni maksimumi za cikloheks-1-enilkarbonsku kiselinu u protičnim rastvaračima uvek na većim talasnim dužinama od onih za 2-metilcikloheks-1-enilkarbonsku kiselinu. Rezultati u aprotičnim rastvaračima su pokazali upravo suprotno. Da bi se objasnili dobijeni rezultati ultraljubičaste apsorpcione frekvence elektronskih prelaza u karbonilnim grupama ispitivanih kiselina su korelisane totalnom solvatohromnom jednačinom oblika: ν = ν0 + sπ* + aα + bβ gde je π* merilo polarnosti rastvarača, β predstavlja skalu bazičnosti rastvarača kao akceptora protona u vodoničnoj vezi, a α predstavlja skalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacije spektroskopskih podataka su izvedene pomoću višestruke linearne regresione analize i razmatrani su suprotni efekti rastvarača na ultraljubičaste apsorpcione maksimume ispitivanih kiselina.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Solvent effect on electronic absorption spectra of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids
T1  - Efekti rastvarača na elektronske apsorpcione spektre cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiseline
EP  - 359
IS  - 5-6
SP  - 353
VL  - 65
UR  - https://hdl.handle.net/21.15107/rcub_technorep_289
ER  - 

@article{
author = "Nikolić, Jasmina and Ušćumlić, Gordana and Krstić, Vera V.",
year = "2000",
abstract = "The ultraviolet absorption spectra of cyclohex-1-enylcarboxylic acid and 2-methylcyclohex-1-enylcarboxylic acid were determined in six protic and nine aprotic solvents in the wavelength range from 200 to 400 nm. The position of the λmax of the two examined acids showed that the ultraviolet absorption maximums of cyclohex-1-enylcarboxylic acid were at consistently longer wavelengths in protic solvents than those of methylcyclohex-1-enylcarboxylic acid. The opposite was true in aprotic solvents. In order to explain the obtained results, the ultraviolet absorption frequencies of the electronic transitions in the carboxy carbonyl group of the examined acids were correlated using a total solvatochromic equation of the form: ν = ν0 + sπ* + aα + bβ, where π* is a measure of the solvent polarity, β represents the scale of solvent hydrogen bond acceptor basicities and α represents the scale of solvent hydrogen bond donor acidities. The correlation of the spectroscopic data was carried out by means of multiple linear regression analysis. The opposing solvent effects on the ultraviolet absorption maximums of the two examined acids were discussed., Ultraljubičasti apsorpcioni spektri cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiseline su određeni u šest protičnih i devet aprotičnih rastvarača u opsegu talasnih dužina od 200 do 400 nm. Položaj λmax za ispitivane kiseline pokazao je da su apsorpcioni maksimumi za cikloheks-1-enilkarbonsku kiselinu u protičnim rastvaračima uvek na većim talasnim dužinama od onih za 2-metilcikloheks-1-enilkarbonsku kiselinu. Rezultati u aprotičnim rastvaračima su pokazali upravo suprotno. Da bi se objasnili dobijeni rezultati ultraljubičaste apsorpcione frekvence elektronskih prelaza u karbonilnim grupama ispitivanih kiselina su korelisane totalnom solvatohromnom jednačinom oblika: ν = ν0 + sπ* + aα + bβ gde je π* merilo polarnosti rastvarača, β predstavlja skalu bazičnosti rastvarača kao akceptora protona u vodoničnoj vezi, a α predstavlja skalu kiselosti rastvarača kao donora protona u vodoničnoj vezi. Korelacije spektroskopskih podataka su izvedene pomoću višestruke linearne regresione analize i razmatrani su suprotni efekti rastvarača na ultraljubičaste apsorpcione maksimume ispitivanih kiselina.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Solvent effect on electronic absorption spectra of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids, Efekti rastvarača na elektronske apsorpcione spektre cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiseline",
pages = "359-353",
number = "5-6",
volume = "65",
url = "https://hdl.handle.net/21.15107/rcub_technorep_289"
}

Nikolić, J., Ušćumlić, G.,& Krstić, V. V.. (2000). Solvent effect on electronic absorption spectra of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 65(5-6), 353-359.
https://hdl.handle.net/21.15107/rcub_technorep_289

Nikolić J, Ušćumlić G, Krstić VV. Solvent effect on electronic absorption spectra of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids. in Journal of the Serbian Chemical Society. 2000;65(5-6):353-359.
https://hdl.handle.net/21.15107/rcub_technorep_289 .

Nikolić, Jasmina, Ušćumlić, Gordana, Krstić, Vera V., "Solvent effect on electronic absorption spectra of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids" in Journal of the Serbian Chemical Society, 65, no. 5-6 (2000):353-359,
https://hdl.handle.net/21.15107/rcub_technorep_289 .

TY  - JOUR
AU  - Ušćumlić, Gordana
AU  - Drmanić, Saša
AU  - Krstić, Vera V.
PY  - 1997
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/113
AB  - The infrared spectra have been recorded for thirteen 3-substituted-5,5-dimethylhydantoins in the region of fundamental C=O stretching vibrations in dichloromethane. The frequencies of symmetric and asymmetric C=O stretching vibrations are correlated with Taft's sigma* substituent constants. When the electron-releasing substituents are in position-3 in the hydantoin ring the stretching frequency increases with the increase in the electronegativity. However, the effect of electron-withdrawing substituents appears to be quite opposite, i.e. the carbonyl stretching vibrations are decreased. The correlations with extended Hammett equation Q(x) = alpha sigma(1) + beta sigma(R) + h and with Swain-Lupton equation p(ij) = fF + rR + h give the results which according to Jaffe can be considered as poor. The correlation obtained from Hammett sigma(p) constants furnish satisfacory results except the substituents with a wide range of polarity. The mechanism of the transmission of substituent effects in hydantoin systems is discussed considering the results of above mentioned observations.
PB  - Natl Inst Science Communication & Information Resources-Niscair, New Delhi
T2  - Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry
T1  - Reversed substituent effect on C=O stretching vibrations in hydantoin derivatives
EP  - 195
IS  - 2
SP  - 193
VL  - 36
UR  - https://hdl.handle.net/21.15107/rcub_technorep_113
ER  - 

@article{
author = "Ušćumlić, Gordana and Drmanić, Saša and Krstić, Vera V.",
year = "1997",
abstract = "The infrared spectra have been recorded for thirteen 3-substituted-5,5-dimethylhydantoins in the region of fundamental C=O stretching vibrations in dichloromethane. The frequencies of symmetric and asymmetric C=O stretching vibrations are correlated with Taft's sigma* substituent constants. When the electron-releasing substituents are in position-3 in the hydantoin ring the stretching frequency increases with the increase in the electronegativity. However, the effect of electron-withdrawing substituents appears to be quite opposite, i.e. the carbonyl stretching vibrations are decreased. The correlations with extended Hammett equation Q(x) = alpha sigma(1) + beta sigma(R) + h and with Swain-Lupton equation p(ij) = fF + rR + h give the results which according to Jaffe can be considered as poor. The correlation obtained from Hammett sigma(p) constants furnish satisfacory results except the substituents with a wide range of polarity. The mechanism of the transmission of substituent effects in hydantoin systems is discussed considering the results of above mentioned observations.",
publisher = "Natl Inst Science Communication & Information Resources-Niscair, New Delhi",
journal = "Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry",
title = "Reversed substituent effect on C=O stretching vibrations in hydantoin derivatives",
pages = "195-193",
number = "2",
volume = "36",
url = "https://hdl.handle.net/21.15107/rcub_technorep_113"
}

Ušćumlić, G., Drmanić, S.,& Krstić, V. V.. (1997). Reversed substituent effect on C=O stretching vibrations in hydantoin derivatives. in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry
Natl Inst Science Communication & Information Resources-Niscair, New Delhi., 36(2), 193-195.
https://hdl.handle.net/21.15107/rcub_technorep_113

Ušćumlić G, Drmanić S, Krstić VV. Reversed substituent effect on C=O stretching vibrations in hydantoin derivatives. in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry. 1997;36(2):193-195.
https://hdl.handle.net/21.15107/rcub_technorep_113 .

Ušćumlić, Gordana, Drmanić, Saša, Krstić, Vera V., "Reversed substituent effect on C=O stretching vibrations in hydantoin derivatives" in Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 36, no. 2 (1997):193-195,
https://hdl.handle.net/21.15107/rcub_technorep_113 .