COMPLEXATIONS OF 13-GROUP METALS(III) WITH 5-CHLOROPHENYL)AZO]-8-HYDROXYQUINOLINE-5-SULFONATE

The complexations of the 13-group metals (Ga-III, In-III, and Tl-III) with rophenyl)azo]-8-hydroxyquinoline-5-sulfonate(hpaq) were studied. In Ga-III-complexation, hpaq coordinates to Ga-III to form a yellow co mplex through a fast process and then this yellow complex slowly chang es to a red complex. The rate constant of the slow process is independ ent of the experimental Ga-III concentration, indicating the presence of a linkage isomerism. In the cases of In-III- and Tl-III-complexatio ns, no linkage isomerism was observed. Copyright (C) 1996 Elsevier Sci ence Ltd