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Efekti rastvarača na elektronske apsorpcione spektre cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiseline

dc.creatorNikolić, Jasmina
dc.creatorUšćumlić, Gordana
dc.creatorKrstić, Vera V.
dc.date.accessioned2021-03-10T09:51:20Z
dc.date.available2021-03-10T09:51:20Z
dc.date.issued2000
dc.identifier.issn0352-5139
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/289
dc.description.abstractThe 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.en
dc.description.abstractUltraljubičasti 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.sr
dc.publisherSerbian Chemical Society, Belgrade
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceJournal of the Serbian Chemical Society
dc.subjectcyclohex-1-enylcarboxylic aciden
dc.subject2-methylcyclohex-1-enylcarboxylic aciden
dc.subjectultraviolet absorption maximumen
dc.subjectprotic and aprotic solventsen
dc.titleSolvent effect on electronic absorption spectra of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acidsen
dc.titleEfekti rastvarača na elektronske apsorpcione spektre cikloheks-1-enilkarbonske i 2-metilcikloheks-1-enilkarbonske kiselinesr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage359
dc.citation.issue5-6
dc.citation.other65(5-6): 353-359
dc.citation.rankM23
dc.citation.spage353
dc.citation.volume65
dc.identifier.fulltexthttp://TechnoRep.tmf.bg.ac.rs/bitstream/id/10569/0352-51390006353N.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_technorep_289
dc.identifier.scopus2-s2.0-0034355396
dc.identifier.wos000087397100011
dc.type.versionpublishedVersion


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