C-13 NMR spectra of two series of pyridine chalcone analogs were determined in deuterated dimethylsulphoxide (DMSO-d(6)). It was established that these compounds were in more stable E-configurations except for the 4-pyridalacetophenone which was in Z-configuration. On the basis of the Hammett correlations of C-13 NMR chemical shifts of the ethylenic bond carbon atoms and the a values for the pyridine "aza" groups, the polarization of ethylenic bonds were discussed. It was established that the opposite effect of the pyridine substituents at the electronic density distribution in pyridalacetophenone and cinnamoylpyridines depends on its direct bonding to the ethylenic carbon or the transmission electronic effects via the carbonyl group, respectively.
TY - CONF
AU - Jovanović, Bratislav Ž.
AU - Misić-Vuković, Milica
AU - Marinković, Aleksandar
AU - Csanadi, Janos
PY - 1999
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/238
AB - C-13 NMR spectra of two series of pyridine chalcone analogs were determined in deuterated dimethylsulphoxide (DMSO-d(6)). It was established that these compounds were in more stable E-configurations except for the 4-pyridalacetophenone which was in Z-configuration. On the basis of the Hammett correlations of C-13 NMR chemical shifts of the ethylenic bond carbon atoms and the a values for the pyridine "aza" groups, the polarization of ethylenic bonds were discussed. It was established that the opposite effect of the pyridine substituents at the electronic density distribution in pyridalacetophenone and cinnamoylpyridines depends on its direct bonding to the ethylenic carbon or the transmission electronic effects via the carbonyl group, respectively.
PB - Elsevier, Amsterdam
C3 - Journal of Molecular Structure
T1 - C-13 NMR spectra of pyridine chalcone analogs
EP - 374
SP - 371
VL - 482
DO - 10.1016/S0022-2860(98)00859-X
UR - conv_1993
ER -
@conference{
author = "Jovanović, Bratislav Ž. and Misić-Vuković, Milica and Marinković, Aleksandar and Csanadi, Janos",
year = "1999",
abstract = "C-13 NMR spectra of two series of pyridine chalcone analogs were determined in deuterated dimethylsulphoxide (DMSO-d(6)). It was established that these compounds were in more stable E-configurations except for the 4-pyridalacetophenone which was in Z-configuration. On the basis of the Hammett correlations of C-13 NMR chemical shifts of the ethylenic bond carbon atoms and the a values for the pyridine "aza" groups, the polarization of ethylenic bonds were discussed. It was established that the opposite effect of the pyridine substituents at the electronic density distribution in pyridalacetophenone and cinnamoylpyridines depends on its direct bonding to the ethylenic carbon or the transmission electronic effects via the carbonyl group, respectively.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Molecular Structure",
title = "C-13 NMR spectra of pyridine chalcone analogs",
pages = "374-371",
volume = "482",
doi = "10.1016/S0022-2860(98)00859-X",
url = "conv_1993"
}
Jovanović, B. Ž., Misić-Vuković, M., Marinković, A.,& Csanadi, J.. (1999). C-13 NMR spectra of pyridine chalcone analogs. in Journal of Molecular Structure
Elsevier, Amsterdam., 482, 371-374.
https://doi.org/10.1016/S0022-2860(98)00859-X
conv_1993
Jovanović BŽ, Misić-Vuković M, Marinković A, Csanadi J. C-13 NMR spectra of pyridine chalcone analogs. in Journal of Molecular Structure. 1999;482:371-374.
doi:10.1016/S0022-2860(98)00859-X
conv_1993 .
Jovanović, Bratislav Ž., Misić-Vuković, Milica, Marinković, Aleksandar, Csanadi, Janos, "C-13 NMR spectra of pyridine chalcone analogs" in Journal of Molecular Structure, 482 (1999):371-374,
https://doi.org/10.1016/S0022-2860(98)00859-X .,
conv_1993 .
