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13 C and 15 N NMR study of mesoionic type A and type B tetrazoles with four nitrogen atoms in the exocyclic group
Author(s) -
Koźmiński Wiktor,
Jaźwiński Jarosaw,
Stefaniak Lech,
Webb Graham A.
Publication year - 1994
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.1260321208
Subject(s) - mesoionic , chemistry , ring (chemistry) , coupling constant , stereochemistry , group (periodic table) , proton , nitrogen , chemical shift , proton nmr , medicinal chemistry , crystallography , organic chemistry , physics , particle physics , quantum mechanics
Abstract 13 C and 15 N NMR measurements are reported from a study of five mesoionic compounds containing either the 2,3‐diphenyl‐ or 1,3‐diphenyltetrazolium ring, and either the 2,3‐diphenyltetrazolium ring or its linear analogue as an exocyclic group. Three 15 N‐labelled compounds were synthesized for signal assignment purposes. Some 15 N 13 C and 15 N 15 N coupling constants were determined. A proton was found to be located on the exocyclic groups of two of the compounds.