Issue 9, 1982

Isomers of 3-methylthio-1,5-diarylformazans and their interconversion in solution

Abstract

1 H and 13C n.m.r. and i.r. spectroscopic studies, including 15N-labelling, on solutions of ArN:N·C(SR):N·NHAr (Ar = Ph, p, or o-tolyl; R = CH3 or CD3) taken in conjunction with established X-ray crystal structures of pure isomers have made it possible to establish the structural causes responsible for temporal changes in the visible spectra. Relative to the formal C[double bond, length half m-dash]N double and C–N single bonds the yellow isomer is shown to have a single anti,s-trans structure whereas the pink isomer comprises syn,s-trans species in rapid tautomeric equilibrium.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 2, 1982, 1117-1121

Isomers of 3-methylthio-1,5-diarylformazans and their interconversion in solution

A. T. Hutton and H. M. N. H. Irving, J. Chem. Soc., Perkin Trans. 2, 1982, 1117 DOI: 10.1039/P29820001117

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