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Structural studies on some mesoionic compounds using nitrogen NMR
Author(s) -
Jazwinski J.,
Stefaniak L.,
Webb G. A.
Publication year - 1988
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.1260261113
Subject(s) - mesoionic , chemistry , nitrogen , chemical shift , sulfur , carbon 13 nmr , fluorine 19 nmr , nuclear magnetic resonance spectroscopy , proton nmr , computational chemistry , carbon 13 nmr satellite , organic chemistry
Abstract 1 H, 13 C, 14 N and 15 N NMR data are reported for two 1,2,3,4‐oxatriazolium‐5‐thiolates and for two 1,2,3,4‐thiatriazolium‐5‐olates. It is demonstrated that nitrogen NMR is the most sensitive technique for determining the structures of these mesoionic compounds; of particular significance is the N‐2 chemical shift, which distinguishes between the presences of either oxygen or sulphur in position 1. Cyclic structures are confirmed for these compounds on the basis of the nitrogen chemical shifts.