Metal carboxylato-hydrazinates are very good precursors for the synthesis of metal as well as mixed metal oxides as these
decompose to nanosized oxides with high surface area most of the times at comparatively lower temperatures. In the present
study one such novel precursor nickel manganese fumarato-hydrazinate (NiMn2(C4H2O4)3·6N2H4) has been prepared and characterized by XRD, FTIR and chemical analysis. The thermal decomposition of the precursor has also
been studied by isothermal, differential thermal and thermogravimetric analysis. The precursor shows two-step dehydrazination
followed by decarboxylation to form NiMn2O4. The infrared spectra show N-N stretching frequency at 965 cm−1, which confirm the bidentate bridging hydrazine. XRD confirms the formation of single phase NiMn2O4.