Non-isothermal Studies of Adduct Molecules of Metallic Halides with Oxo-Compomids in Solid State. I.

Abstract

Abstract Non-isothermal studies of some adduct molecules of metallic halides with dioxane as the type MX2·y(dioxane) in;solid state, where M=Mn(II), Co(II), Ni(II), Cu(II), Zn(II) or Cd(II), X=Cl− or Br− and y=0.5–2, were carried out with a Derivatograph. These inorganic adduct molecules lose dioxane molecule in single or multiple steps on heating. Thermally stable intermediate products were isolated and characterised by elemental analysis and IR spectra. The activation energy for each step of decomposition of the adduct was evaluated from the analysis of TG, DTG and DTA curves. Enthalpy change was evaluated from the DTA peak area and the order of reaction was found to be unity for each step of decomposition. Thermal stability of the adducts was discussed.