Приказ основних података о документу
Reversed substituent effect on C=O stretching vibrations in hydantoin derivatives
dc.creator | Ušćumlić, Gordana | |
dc.creator | Drmanić, Saša | |
dc.creator | Krstić, Vera V. | |
dc.date.accessioned | 2021-03-10T09:39:52Z | |
dc.date.available | 2021-03-10T09:39:52Z | |
dc.date.issued | 1997 | |
dc.identifier.issn | 0376-4699 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/113 | |
dc.description.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. | en |
dc.publisher | Natl Inst Science Communication & Information Resources-Niscair, New Delhi | |
dc.relation | Research Fund of Serbia, Belgrade | |
dc.rights | restrictedAccess | |
dc.source | Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry | |
dc.title | Reversed substituent effect on C=O stretching vibrations in hydantoin derivatives | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 195 | |
dc.citation.issue | 2 | |
dc.citation.other | 36(2): 193-195 | |
dc.citation.spage | 193 | |
dc.citation.volume | 36 | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_technorep_113 | |
dc.identifier.wos | A1997WV63900020 | |
dc.type.version | publishedVersion |