Some Aspects of the Chemistry of Metal Complex Dyestuffs

Abstract

Metal complex formation by azo compounds is discussed in relation to the metal and the structure of the azo compound with particular regard to the effect of the electronic configuration of the former and the nature of the donor groups or atoms in the latter on the stability, stoicheiometry, geometry and oxidation state of the products obtained. The relevance of the various factors to the synthesis and practical application of 1:1 and symmetrical and unsymmetrical 2 :1 chromium and cobalt complexes of tridentate azo compounds is considered in the light of current views regarding ligand replacement reactions and the influence of coordination on the reactivity of organic ligands.