Enthalpy of formation of oxalyl chloride and the COCl radical

The heat of formation for liquid oxalyl chloride has been determined by reaction calorimetry to be –85.6 ± 0.5 kcal/mole. From this it is deduced that ΔH°f298 oxalyl chloride (g)=– 78.0 ± 1.4 kcal/mole and ΔH°f298(COCl,g)=–4.0 ± 3 kcal/mole.