Scandium(III) Complexes of 8-Hydroxyquinoline and Derivatives

Abstract

Under the conditions specified, scandium(III) and 8-hydroxyquinoline react in aqueous solution to give Sc(C9H6NO)3•H2O and not the adduct, Sc(C9H6NO)3•C9H7NO, as previously reported. The adduct is formed by reaction of the aquo tris chelate in molten 8-hydroxyquinoline and the anyhdrous tris chelate is obtained by thermal decomposition of the adduct. The 2-chloro, 4-chloro, and 5-methyl and 5-nitro derivatives also yield aquo tris chelates from aqueous solution while the 2-methyl and 4-methyl derivatives give adducts.