Non-isothermal Studies of Adduct Molecules of Metallic Halides with Oxo Compounds in Solid State. II

Abstract

Abstract Non-isothermal studies of several adduct molecules of metallic halides with oxo-compounds as the type MX2(THF)y, in solid state were carried out with a Derivatograph, where M is Mn(II), Co(II), Ni(II), Cu(II) or Cd(II), X is Cl− or Br−, THF is the abbreviated form of tetrahydrofuran and y is 0.25–2.00. These adduct molecules lost tetrahydrofuran in single or multiple steps upon heating. Thermally stable intermediate products were isolated and characterised by elemental analysis and IR spectral measurement. The activation energy for each step of decomposition of the adducts was evaluated from the analysis of TG, DTG, and DTA curves of the respective derivatograms. Enthalpy change was evaluated from DTA peak area and order of reaction was found to be unity for each step of decomposition. Thermal parameters for the above adducts were compared with those of the adducts of dioxane.