Evaluation of standard enthalpy of formation of copper(I) pivalate

The evaluation technique of the standard enthalpy of formation was developed for pivalate complexes by means of differential scanning calorimetry method. The heating the binary system [(CH 3 ) 3 CCOOAg + Cu] allowed to determine the standard enthalpy of the reaction (CH 3 ) 3 CCOOAg (s) + Cu (s) = (CH 3 ) 3 CCOOCu (s) + Ag (s) , Δ r H 298.15 ∘ = −39.6 ± 5.2 kJ mol −1 . Using the enthalpy of formation of silver pivalate (CH 3 ) 3 CCOOAg (s) , measured earlier, the value of standard enthalpy of formation of copper(I) pivalate was estimated: Δ f H 298.15 ∘ [(CH 3 ) 3 CCOOCu (s) ] = −506.5 ± 7.6 kJ mol −1 . Preliminary study of thermal behavior of silver pivalate showed the presence of two endothermic effects related to phase transitions and the absence of the heat effect of decomposition process of this compound.