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Investigation of Benzimidazoles. 6—transmission of substituent effects in dianion radicals of 2-substituted 5(6)-nitrobenzimidazoles studied by ESR spectroscopy

✍ Scribed by V. A. Lopyrev; L. I. Larina; T. I. Vakul'skaya; E. F. Shibanova; I. A. Titova; M. G. Voronkov

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
587 KB
Volume
23
Category
Article
ISSN
0749-1581

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Investigation of Benzimidazoles. 5—trans
Investigation of Benzimidazoles. 5—transmission of the substituent effects in 2-substituted 5(6)-nitrobenzimidazoles studied by 1H, 13C and 15N NMR spectroscopy
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The iniluence of substituents on the 'H, "C and 15N NMR chemical shifts of 2-substituted 5(6)nitrobenzimidazoles and their analogues labelled with 15N in the nitro group was investigated. It was found that the substituent effects are transmitted to the carbon and hydrogen nuclei in positions 4-7 mai

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## Abstract The influence of substituents on the ^13^C NMR chemical shifts of 2‐substituted 1‐methylbenzimidazoles has been investigated. The electronic effects of the substituents are transmitted to C‐4 and C‐7 mainly by the resonance mechanism, and to C‐5, C‐6 and __N__‐CH~3~, by approximately eq

Transmission of the substituent effects
Transmission of the substituent effects in 2-substituted benzimidazoles studied by 1H and 13C nuclear magnetic resonance
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## Abstract The substituent influence on the ^1^H and ^13^C NMR chemical shifts in 2‐substituted benzimidazoles and their anions and cations has been investigated. The transmission of the electronic effects of substituents from C‐2 to C‐5 (6) is approximately 20% less effective than that in the opp