Preparation and characterisation of glutarate and adipate complexes of metals with neutral hydrazine

New metal glutarate dihydrazinate hydrates of the types; M(C5H6O4).2N(2)H(4 ).H2O, where M is Co(II) and Ni(II), Zn(C5H6O4).2N(2)H(4).2H(2)O and Cd(C5H 6O4).2N(2)H(4).5H(2)O and metal adipate dihydrazinates of the formula M(C6H 8O4).2N(2)H(4), where M is Co(II),Ni(II),Zn(II) and Cd(II), have been prepa red and characterised by spectral, magnetic, XRD and thermal studies. Infra red spectra reveal the bidentate coordination of both hydrazine and dicarbo xylate moities. The magnetic and electronic spectral data indicate octahedr al coordination far the cobalt and nickel compounds. The simultaneous TGA-D TA data show that all of the complexes decompose via the respective metal g lutarate or adipate intermediates undergoing exothermic decomposition to gi ve metal oxide as the residual product. The loss of hydrazine is exothermic for the cobalt and nickel compounds, whereas it is endothermic for the zin c and cadmium compounds. The X-ray powder diffraction patterns of the simil ar type of complexes indicate isomorphism among themselves.