THERMOCHEMISTRY OF HETEROATOMIC COMPOUNDS .5. ENTHALPIES OF VAPORIZATION AND SOLVATION OF TETRACOORDINATED PHOSPHORUS DERIVATIVES

The enthalpies of vaporization of different classes of tetracoordinate d phosphorous compounds have been determined according to their enthal pies of solution in hexane and carbon tetrachloride. Good agreement of some values with literature data is established. The enthalpies of sp ecific (hydrogen bond) interaction of derivatives having acid properti es, with p-xylene, dioxan and acetone have been determined. The enthal pies of solvation of cyclic and acyclic derivatives of methylphosphoni c acid in different solvents are analysed and discussed.