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NMR investigations on benzheteroazoles. 2 —NMR investigations of N ‐acylated 2‐aminobenzimidazoles
Author(s) -
Gründemann E.,
Graubaum H.,
Martin D.,
Schiewald E.
Publication year - 1986
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260240107
Subject(s) - chemistry , chemical shift , substituent , carbon 13 nmr , nuclear magnetic resonance spectroscopy , line (geometry) , stereochemistry , computational chemistry , geometry , mathematics
The 13 C NMR chemical shifts of 74 N ‐acylated 2‐aminobenzimidazoles were determined and assigned. The chemical shifts are discussed as a function of electronic and spatial substituent effects. Line broadening for certain C signals are traced to prototropy at N‐1 and N‐3, and N‐3 and N exo .
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