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Transmission of the substituent effects in 2‐substituted benzimidazoles studied by 1 H and 13 C nuclear magnetic resonance
Author(s) -
Lopyrev V. A.,
Larina L. I.,
Vakul'skaya T. I.,
Larin M. F.,
Nefedova O. B.,
Shibanova E. F.,
Voronkov M. G.
Publication year - 1981
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270150302
Subject(s) - substituent , chemical shift , chemistry , transmission (telecommunications) , solvent , resonance (particle physics) , photochemistry , nuclear magnetic resonance , crystallography , computational chemistry , stereochemistry , organic chemistry , atomic physics , physics , electrical engineering , engineering
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 opposite direction. The solvent influence on the chemical shifts of protons and transmission effects in the charged forms of 2‐substituted benzimidazoles has been studied.