BINUCLEAR DIVALENT METAL CHELATES BRIDGED BY AROMATIC DIAMINES

Abstract
Aromatic diamine Schiff bases derived from mono or dicarbonyl compounds are multidentate ligands which can act in a variety of ways. The oxygen or diamine groups may bridge two metal atoms and thus, may give rise to some unusual species.1,2 This has led to the synthesis and characterisation of metal complexes with unusual structural and magnetic properties.3,4 We report here, the isolation and characterisation of divalent manganese, iron, cobalt, nickel and copper complexes of bisacetylacetone-m-phenylenediamine (Acac2pola) and bisacetylacetone-2,6-diaminopyridine (Acac2dap).