Synthesis & Characterisation of Some 3d Metal Complexes with Isatin Hydrazones

Abstract

Isatino-3-benzhydrazone (IBZ) and isatino-3-(2-hydroxy-benzhydrazone) (IHBZ) have been synthesized and their interaction with some 3d metals has been studied both in solution and solid states. Conductometric, pH-metric studies and elemental analysis suggest formation fo 1:2 and 1:1 (metal-ligand) complexes with IBZ and IHBZ, respectively. All the complexes except Cr (III) and Fe (III) complexes of IBZ are nonionic. Their magnetic moment values correspond to the spin-only values for the octahedral complexes. Electrometric and infrared spectral studies indicate that deprotonated isatin- lactim form ( - N = C - OH) of the present compounds participates in complexation. IBZ acts as a monobasic tridentate and IHBZ as a diabasic tetradentate ligand.