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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2018, Volume 69, Issue 1, 64-69

https://doi.org/10.37358/RC.18.1.6045

Liviu Birzan, Mihaela Cristea, Constantin C. Draghici, Alexandru C. Razus

Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines

Abstract:

The 1H and 13C NMR spectra of several 2,6-diheteroarylvinyl heterocycles containing 4-azulenyl moiety were recorded and their proton and carbon chemical shifts were compared with those of the compounds without double bond between the heterocycles. The influence of the nature of central and side heterocycles, molecule polarization and anisotropic effects were revealed. The highest chemical shifts were recorded for the pyrylium salts and the lowest at pyridines, but in the case of the pyridinium salts, the protons chemical shifts at the central heterocycle are more shielded due to a peculiar anisotropy of the attached vinyl groups.
Keywords:
azulene; heterocycles; NMR chemical shifts

Issue: 2018, Volume 69, Issue 1
Pages: 64-69
Publication date: 15/02/2018
https://doi.org/10.37358/RC.18.1.6045
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This article is published under the Creative Commons Attribution 4.0 International License
Citation Styles
Cite this article as:
BIRZAN, L., CRISTEA, M., DRAGHICI, C.C., RAZUS, A.C., Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines, Rev. Chim., 69(1), 2018, 64-69.

Vancouver
Birzan L, Cristea M, Draghici CC, Razus AC. Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines. Rev. Chim.[internet]. 2018 Jan;69(1):64-69. Available from: https://doi.org/10.37358/RC.18.1.6045


APA 6th edition
Birzan, L., Cristea, M., Draghici, C.C. & Razus, A.C. (2018). Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines. Revista de Chimie, 69(1), 64-69. https://doi.org/10.37358/RC.18.1.6045


Harvard
Birzan, L., Cristea, M., Draghici, C.C., Razus, A.C. (2018). 'Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines', Revista de Chimie, 69(1), pp. 64-69. https://doi.org/10.37358/RC.18.1.6045


IEEE
L. Birzan, M. Cristea, C.C. Draghici, A.C. Razus, "Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines". Revista de Chimie, vol. 69, no. 1, pp. 64-69, 2018. [online]. https://doi.org/10.37358/RC.18.1.6045


Text
Liviu Birzan, Mihaela Cristea, Constantin C. Draghici, Alexandru C. Razus,
Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines,
Revista de Chimie,
Volume 69, Issue 1,
2018,
Pages 64-69,
ISSN 2668-8212,
https://doi.org/10.37358/RC.18.1.6045.
(https://revistadechimie.ro/Articles.asp?ID=6045)
Keywords: azulene; heterocycles; NMR chemical shifts


RIS
TY - JOUR
T1 - Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines
A1 - Birzan, Liviu
A2 - Cristea, Mihaela
A3 - Draghici, Constantin C.
A4 - Razus, Alexandru C.
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2018
VL - 69
IS - 1
SP - 64
EP - 69
UR - https://doi.org/10.37358/RC.18.1.6045
KW - azulene
KW - heterocycles
KW - NMR chemical shifts
ER -


BibTex
@article{RevCh2018P64,
author = {Birzan Liviu and Cristea Mihaela and Draghici Constantin C. and Razus Alexandru C.},
title = {Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines},
journal = {Revista de Chimie},
volume = {69},
number = {1},
pages = {64-69},
year = {2018},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.18.1.6045},
url = {https://revistadechimie.ro/Articles.asp?ID=6045}
}
 
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