The kinetics of disproportionation reaction of hexafluoroacetylacetonate-copper(I)-cycloocta-1,5-diene [(hfac)Cu-I(COD)] was investigated by the use of differential scanning calorimetry (DSC) with different heating rates in dynamic nitrogen atmosphere. First, the activation energies (E(a)s) of the disproportionation reaction were estimated with model-free isoconversional methods, respectively. The E(a)s were found to fall within the range between 17.6 and 18.7 U mol(-1), with no temperature and heating rate effects observed. Then, when the Ea was ascertained, the model-fitting methods with least square fitting procedure were adopted to determine the kinetic model for the disproportionation reaction. As a result, the disproportionation reaction follows second-order reaction kinetics. (c) 2007 Elsevier B.V. All rights reserved.