Preparation and Characterisation of Glutarate and Adipate Complexes of Metals with Neutral Hydrazine

Abstract

New metal glutarate dihydrazinate hydrates of the types; M(C₅H₆O₄).2N₂H4.H₂O, where M is Co(ll) and Ni(ll), Zn(C₅H₆O₄).2N₂H₄.2H₂O and Cd(C₅H₆O₄).2N₂H₄.5H₂O and metal adipate dihydrazinates of the formula M(C₆H₈O₄).2N₂H₄, where M is Co(ll), Ni(ll), Zn(ll) and Cd(ll), have been prepared and characterised by spectral, magnetic, XRD and thermal studies. Infrared spectra reveal the bidentate coordination of both hydrazine and dicarboxylate moities. The magnetic and electronic spectral data indicate octahedral coordination for the cobalt and nickel compounds. The simultaneous TGA-DTA data show that all of the complexes decompose via the respective metal glutarate or adipate intermediates undergoing exothermic decomposition to give metal oxide as the residual product. The loss of hydrazine is exothermic for the cobalt and nickel compounds, whereas it is endothermic for the zinc and cadmium compounds. The X-ray powder diffraction patterns of the similar type of complexes indicate isomorphism among themselves