Combustion- and Solution-Calorimetric Studies on Organophosphorus Compounds

Abstract

The standard enthalpies of formation of phenylphosphonic, phenyl-phosphinic, and diphenylphosphnic acids have been determined by oxygen static bomb calorimetry to be: [equations] These values were compared and combined with the results of solution reaction calorimetry on related compounds and the standard enthalpy of formation of dibromophenylphosphine derived, [equation]. The existing literature on these compounds has been critically reviewed and the significance of bonding in halo-phenylphosphines briefly discussed.

The standard enthalpy of formation of tri(p-tolyl) methanol has been determined from the enthalpy of combustion measured by oxygen static bomb calorimetry, [equations] derived for the gas-phase enthalpy of formation increment per p-methyl group.