Thermodynamic characteristics of copper(I) perfluorocyclohexanoate C<sub>6</sub>F<sub>11</sub>COOCu

The [Сu—C6F11COOAg] system was studied using thermogravimetry, differential scanning calorimetry and mass spectrometry methods. It has been established that in the temperature range 370–445 K, a solid-phase exchange reaction occurs in the condensed phase of the system with the formation of C6F11COOCu and silver. The enthalpy of this reaction was found to be ΔrHo298.15 = –17.5 ± 4.0 and the standard enthalpy of formation of a crystalline copper complex ΔfHo298.15 = –2769 ± 25 kJ/mol. Sublimation of the copper complex is accompanied by the transition into the gas phase of dimeric (C6F11COOCu)2 ΔsHoТ = 134.4 ± 7.2 kJ/mol and a small amount of tetrameric molecules (C6F11COOCu)4. The standard enthalpy of formation of the dimer complex in the gas phase was calculated to be ΔfHo298.15 = –5404 ± 26 kJ/mol. The paper examines the possibility of exothermic interaction of copper perfluorocyclohexanoate with metallic copper in the condensed phase.