MIXED LIGAND BINUCLEAR COMPLEXES OF MAGNESIUM AND CALCIUM WITH SOME CHELATING ORGANIC ACIDS AS PRIMARY LIGANDS AND A SCHIFF BASE AS SECONDARY LIGAND

摘要

Magnesium and calcium are biologically important metals. Their coordination chemistry in the mixed ligand environment would be helpful to unravel their mode of storage and transport in the bio-systems. Mixed ligand complexation of magnesium and calcium has recently been receiving attention. Presently, we have synthesised and characterised mixed ligand binuclear complexes of general formula [M2L2L'], where, M=Mg~(II) or Ca~(II), L = deprotonated salicylaldehyde (sald), salicylic acid (sal), anthranilic acid (anth) or 8-hydroxyquinoline (8Hq) and L'=deprotonated schiff base, bis-(salicylidene)-p-phenylenediamine (salphen).