Abstract
The standard enthalpy of formation of 2-chloro-6-(trichloromethyl)pyridine(cr) was determined to be −(55.4 ± 1.8) kJ · mol −1 at 298.15 K by rotating-bomb oxygen combustion calorimetry using paraffin oil as a combustion aid and As 2O 3(aq) as a reducing agent for Cl 2 formed. Nitric acid and chlorometallic acids of noble metals present in the final bomb solution were analysed by ion-chromatographic and atomic-absorption spectrometric methods, respectively. The effect of catalytic pre-oxidation of As 2O 3(aq) was evaluated. The standard molar energy of combustion was calculated using a computation form derived by combining that for CHON compounds with that for CHOCl compounds. The modifications of the form are described.
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