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The thermal decomposition of C 60 Br 24 •2Br 2  has been studied by Differential Scanning Calorimetry (DSC) at different heating rates. Depending from the heating rate, the thermal decomposition peak occurred between 163 °C and 201 °C with an activation energy E #  = 108.6 kJ/mol. The decomposition products are C 60  (assessed by FT-IR) and molecular bromine. From the decomposition enthalpy measured by DSC, the enthalpy of formation ΔH f °(C 60 Br 24(c) ) = 2114 ± 34 kJ/mol has been determined. By group increment or group additivity method ΔH f °(C 60 Br 24 (g) ) = 2184 kJ/mol has been calculated, in fair agreement with the experimental value. Furthermore, through the group increment method ΔG f °(C 60 Br 24 (g) ) = 3264 kJ/mol has been estimated. The enthalpy of the C-Br bond in the C 60 Br 24  molecule was found comprised between 108 and 120 kJ/mol.

Thermochemical properties of C 60 Br 24