Notes. Co-ordination selectivity in the reaction of aluminium(III) 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.