Thermodynamic Characteristics of Copper(I) Perfluorocyclohexanoate C₆F₁₁COOCu

The [Сu–C₆F₁₁COOAg] system has been studied by thermogravimetry, differential scanning calorimetry, and mass spectrometry methods. It has been found that a solid-phase exchange reaction to form C₆F₁₁COOCu and silver occurs in the condensed phase of the system in a temperature range of 370–445 K. It has been found that the enthalpy of this reaction is Δ_r \(H_{{298.15}}^{0}\) = −17.5 ± 4.0 kJ/mol and the standard enthalpy of formation of a crystalline copper complex is Δ_f \(H_{{298.15}}^{0}\) = −2769 ± 25 kJ/mol. The sublimation of the copper complex is accompanied by the transition of dimeric (C₆F₁₁COOCu)₂ molecules (Δ_s \(H_{T}^{0}\) = 134.4 ± 7.2 kJ/mol) and a small amount of tetrameric (C₆F₁₁COOCu)₄ molecules into the gas phase. The standard enthalpy of formation of a dimer complex in the gas phase of Δ_f \(H_{{298.15}}^{0}\) = −5404 ± 26 kJ/mol has been calculated. The possibility of occurrence of the exothermic interaction of copper perfluorocyclohexanoate with metallic copper in the condensed phase has been explored.