Standard enthalpy of formation of bis(diethyldithiocarbamato)nickel(II) at 298 K and the nickel–sulphur bond energy

Abstract

The standard enthalpy of formation of bis(diethyldithiocarbamato) nickel(II) has been derived by solution calorimetry, ΔH_f^⊖(298 K)=–118.4 ± 9.8 kJ mol^–1. Thermochemical measurements are based on a ligand-exchange reaction involving the complete displacement of pentane-2,4-dionate in bis(pentane-2,4-dionato) nickel(II) by the diethyldithiocarbamate anion. The homolytic and heterolytic nickel–sulphur bond-energy parameters are calculated to be 193 ± 13 and 666 ± 13 kJ repectively.