SYNTHESIS, CHARACTERIZATION AND MODE OF THERMAL-DECOMPOSITION OF OXALATE COMPLEXES OF CADMIUM(II) AND ZINC(II) WITH HYDRAZINE, AND COBALT(II), NICKEL(II) AND COPPER(II) WITH HYDRAZINIUM CATION

The reaction of CdSO4 with hydrazine and hydrazinium oxalate in aqueou s solution at several pH values leads to the formation of various comp lexes, Only three complexes were successfully isolated: Cd-2(C2O4)(2) . N2H4, CdC2O4 . N2H4 . O.5H(2)O and CdC2O4 . 1.5N(2)H(4). The reactio n of ZnSO4 with hydrazine and hydrazinium oxalate produces only the co mplex ZnC2O4 . 2N(2)H(4). On reaction of MSO(4) with hydrazinium oxala te, double oxalates of Co, Ni and Co of general formulae Co(NH3NH3)(C2 O4)(2) . 2H(2)O, Ni-2(NH3NH3)(C2O4)(3) . 4H(2)O, and Cu(NH2NH3)(2)(C2O 4)(2) . H2O were obtained. The complexes obtained were characterized b y elemental analysis, X-ray powder patterns, IR spectroscopy, and TG a nd DTA techniques.