Synthesis and Thermodynamic Properties of Cadmium Oxopivalate CdPiv2 ∙ Cd4OPiv6

The cadmium oxopivalate complex CdPiv2 ∙ Cd4OPiv6 has been synthesized and its thermodynamic characteristics have been studied using the Knudsen effusion technique with the mass spectral analysis of the gas phase. It has been found that vaporization of this complex proceeds congruently and the saturated vapor above it consists of molecules Cd2Piv4, Cd4Piv8, and Cd4OPiv6. The standard enthalpies of sublimation of these molecules have been determined; the standard enthalpy of vaporization of complex CdPiv2 ∙ Cd4OPiv6 and standard enthalpy of dissociation of the Cd4Piv8 molecule according to the second and third laws of the thermodynamics have been found to be $${{\Delta }_{S}}H_{{298}}^{^\circ }$$ = 297.0 ± 12.1 kJ/mol and $${{\Delta }_{D}}H_{{298}}^{^\circ }$$ = 133.2 ± 16.8 kJ/mol, respectively. It is shown that the oxopivalate cadmium complex can be used as a precursor in the MO CVD method for the preparation of thin oxide films and coatings.