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15N, 13C and 1H NMR spectra of the 2:1 cobalt(III) complexes of some azo dyes

✍ Scribed by Antonín Lyčka; Josef Jirman; Aleš Cee

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

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✦ Synopsis

Abstract

The ^15^N, ^13^C and ^1^H NMR spectra of 2:1 cobalt(III) complexes of azo dyes and their ^15^N isotopomers, derived from substituted 2‐hydroxyaniline azo coupling products with acetoacetanilide, were measured. It was found that, in contrast to precursors existing fully in their hydrazone forms, 2:1 cobalt(III) complexes exist in (E)‐azo configurations, cobalt being bound to oxygens which originate in hydroxy and amide groups and nitrogen from substituted anilines as starting material.

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