THERMODYNAMICS OF ORGANOSELENIUM AND ORGA NOTELLURIUM COMPOUNDS

The experimental values of enthalpies of formation Delta(f)H degrees a nd heat capacity for organic compounds of selenium and tellurium, incl uding their complexes with dialkylzinc and dialkylcadmium were reporte d and discussed. The variants of combustion enthalpy method and reacti on calorimetry applied in the determination of Delta(f)H degrees value s were considered. The enthalpies of disruption of chemical bonds form ed by selenium and tellurium were calculated from the values of Delta( f)H degrees. The data on the temperature dependence of heat capacity w ere used to determine the absolute entropy, temperature, enthalpy and entropy of melting, entropy of formation and other thermodynamic param eters for the studied compounds. The regularities in the change of ent halpies, entropies and Gibbs functions of disruption of the correspond ing chemical bonds were stated.