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15N and 13C NMR study of acylated hydrazines. The instability of trifluoroacethydrazide in the solid state

✍ Scribed by Hans Fritz; Haukur Kristinsson; Max Mollenkopf; Tammo Winkler

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
463 KB
Volume
28
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Trifluoroacethydrazide is unstable even in the solid state with respect to hydrazonium N,N′‐ditrifluoroacetyl hydrazinate, as shown by ^15^N and ^13^C NMR spectroscopy. The ^1^H, ^13^C and ^15^N NMR data and rotamer distributions of formyl‐, acet‐ and trifluoroacet‐hydrazide and of N,N′‐diformyl‐, N,N′‐diacetyl‐ and N,N′‐ditrifluoroacetyl‐hydrazine are reported and compared with the results of earlier investigations. A conformational dependence is observed for ^1^J(NH) and ^2^J(NH) in the formylhydrazides and of ^1^J(NH), ^2^J(NH) ^3^J(NH) in the N,N′‐diformylhydrazines. The conformational dependence of ^2^J(CH) in formamide, reported in the literature, however, could not be confirmed.

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