Comparative study of the electronic structure of Bi-Systems 2212

1995 ◽  
Vol 36 (1) ◽  
pp. 93-96
Author(s):  
É. A. Kravtsova ◽  
L. N. Mazalov ◽  
G. K. Parygina ◽  
I. P. Asanov ◽  
A. A. Kamarzin
Keyword(s):  
Electronic Structure ◽  
Comparative Study

Comparative Study of Electronic Structure Cyanine Bases versus Parent Cationic Cyanines

2017 ◽  
Vol 6 (3) ◽  
pp. 334-345 ◽  
Author(s):  
P. Y. Kobzar ◽  
E. L. Pavlenko ◽  
V. A. Brusentsov ◽  
O. P. Dmytrenko ◽  
N. P. Kulish ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Comparative Study

Etudes d'hétérocycles pentagonaux polyhétéroatomiques par résonance magnétique nucléaire du 13C. Thiazoles et thiazolo[2,3-e]tétrazoles

1978 ◽  
Vol 56 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Robert Faure ◽  
Jean-Pierre Galy ◽  
Emile-Jean Vincent ◽  
José Elguero
Keyword(s):  
Electronic Structure ◽  
Comparative Study ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Substituent Effects ◽  
Coupling Constants ◽  
Thiazole Ring ◽  
Résonance Magnétique

Carbon-13 nmr spectra of 18 thiazoles with different substituents (R = CH3, C6H5, Cl, Br, NH2 et N3) have been recorded. The 13C chemical shifts and the nJ(C,H) coupling constants are discussed as a function of the nature of the substituent and the electronic structure of the thiazole ring. The 2-azido substituted thiazoles show azido-tetrazole isomerism, making possible a comparative study of substituent effects in thiazole and thiazolotetrazole rings. These studies have been extended to other heterocycles: benzothiazole, isothiazole, and isoxazole.

Sign in / Sign up

Export Citation Format

Share Document