Synthesis and properties of some transition metal complexes of Schiff base derived from the condensation of 2,6-pyridinedicarboxaldehyde and 8-aminoquinoline

The Schiff base derived from the condensation of 8-aminoquinoline and 2,6-pyridinedicarboxaldehyde has been synthesized by two routes. Direct reaction of the amine and the dialdehyde lead to the formation of the Schiff base which was then used to synthesize a number of transition metal-schiff-base complexes. In another procedure metal salts were. reacted with a mixture of the amine and the dialdehyde to yield schiff-base-metal complexes. The decomposition of one of these complexes yielded the required Schiff base. Complexes synthesized by either route were isolated and mono-, di- and trinuclear species were identified.