Notes. Co-ordination selectivity in the reaction of aluminium(<scp>III</scp>) with 8-hydroxy-7-[(6′-sulpho-2′-naphthyl)azo]quinoline-5-sulphonic acid

Abstract

Studies have been made on the co-ordination behaviour of aluminium(III) with 8-hydroxy-7-[(6′-sulpho-2′-naphthyl)azo]quinoline-5-sulphonic acid (H3L), capable of two different co-ordination modes. The H3L co-ordinates with aluminium(III) to form a chelate complex [AlL(H2O)4] through the donation of its heterocyclic nitrogen and phenolic oxygen atoms with a five-membered chelate ring. The co-ordination mechanism is also presented.