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Efekat supstituenata na apsorpcione spektre 3-N-(4-supstituisanih fenil)-5-karboksi uracila u različitim rastvaračima - deo II

dc.creatorValentić, Nataša
dc.creatorUšćumlić, Gordana
dc.creatorRadojković-Veličković, M.
dc.date.accessioned2021-03-10T09:51:16Z
dc.date.available2021-03-10T09:51:16Z
dc.date.issued2000
dc.identifier.issn0352-5139
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/288
dc.description.abstractAbsorption spectra of some 3-N-(4-substituted phenyl)-5-carboxy uracils, previously determined in twelve solvents, are correlated with substituent sp+ values or by dual substituent parameter correlations involving sI and sR+ values. The substituents at the phenyl nucleus are as follows: H, Cl, Br, I, Me, Et, OMe, COOH and NO2. Considering the structure of the investigated system, it is very probable that the effect of the substituent at the phenyl nucleus on the electronic spectra of the substituted uracils is influenced by resonance interactions between the electron pairs of both the nitrogen atoms, the carbonyl groups and the substituent itself. The polarity of the reaction medium also affects the complex resonance interactions in the molecules of the investigated compounds. The obtained results support a suggestion made by Brownlee and Topsom that UV/visible spectral shifts can conform to reasonable precise linear free energy relationships if the substituent is not a part of the chromophoric system.en
dc.description.abstractApsorpcioni spektri 3-N-(4-supstituisanih fenil)-5-karboksi uracila (supstiuenti: H, Cl, Br, I, Me, Et, OMe, COOH i NO2) su korelisani prostom i proširenom Hammett-ovom jednačinom uključujući sp+ odnosno sI i sR+ konstante u dvanaest rastvarača različite polarnosti. Zadovoljavajući rezultati korelacije apsorbcionih spektara za elektronske prelaze u karboksi karbonilnoj grupi sa konstantama supstiuenata su potvrda ispravnosti odabranog modela za proučavanje mehanizma prenošenja efekata supstituenata kroz složene molekule 3-N-(4-supstituisanih fenil)-5-karboksi uracila.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.subjectabsorption spectraen
dc.subjectsubstituent effectsen
dc.subjectsolvent effectsen
dc.subjectintramolecular hydrogen bonden
dc.titleEffects of substituents on the electronic absorption spectra of 3-N-(4-substituted phenyl)-5-carboxy uracils in different solvents: Part IIen
dc.titleEfekat supstituenata na apsorpcione spektre 3-N-(4-supstituisanih fenil)-5-karboksi uracila u različitim rastvaračima - deo IIsr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage86
dc.citation.issue2
dc.citation.other65(2): 81-86
dc.citation.rankM23
dc.citation.spage81
dc.citation.volume65
dc.identifier.fulltexthttp://TechnoRep.tmf.bg.ac.rs/bitstream/id/10564/JSerbChemSoc652200081-6-2-7.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_technorep_288
dc.identifier.scopus2-s2.0-0037813328
dc.identifier.wos000085721500001
dc.type.versionpublishedVersion


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