• P Ravindranathan

      Articles written in Journal of Chemical Sciences

    • Preparation, characterization and thermal analysis of metal hydrazinocarboxylate derivatives

      P Ravindranathan K C Patil

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      The reaction of hydrazinocarboxylic acid, N2H3COOH, with metal ions in the presence of hydrazine hydrate yields metal hydrazinocarboxylate derivaties like: M(N2H3COO)2·nH2O, M=Mg, Ca and Mn; M (N2H3COO)2(N2H4)2, M=Mn, Fe, Co, Ni and Zn; N2H5M (N2H3COO)3·H2O, M=Fe, Co, Ni, Zn; and N2H5Mg(N2H3COO)3. Reaction conditions to obtain a desired product have been standardised and a probable reaction mechanism for the formation of different products proposed. Thermal analysis of the compounds has been investigated using simultaneous TG-DTG-DTA. Metal hydrazinocarboxylate derivatives decompose in air at low temperatures to the respective metal oxides.

    • Catalytic decomposition of hydrogen peroxide on fine particle ferrites and cobaltites

      Tanu Mimani P Ravindranathan K C Patil

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      The kinetics of heterogeneous decomposition of hydrogen peroxide on fine particle ferrites, MFe2O4 and cobaltites, MCo2O4, where M=Mn, Fe, Co, Ni, Zn and Mg, have been investigated. The decomposition of H2O2 was found to be first order at low concentration (0·3%) and zero order at high concentration (30%) of H2O2. The catalytic activity of cobaltites on the decomposition of H2O2 is found to be better than ferrites. The observed catalytic behaviour of ferrites and cobaltites has been attributed to their fine particle nature, large surface area and electronic structure.

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