THERMOCHEMISTRY OF HETEROATOMIC COMPOUNDS .6. ENTHALPY OF SOLVATION AND COMPLEX-FORMATION OF SOME HALIDES OF 3-COORDINATED PHOSPHORUS-COMPOUNDS IN PYRIDINE

Using previously published values of the enthalpies of solvation of so me derivatives of three-coordinated phosphorus compounds, the contribu tions of the non-specific solvation enthalpies in the general solvatio n effect in benzene, p-xylene, methanol and pyridine have been calcula ted. Taking into account the known possibility of intramolecular compl ex formation between halogenated derivatives of P-III and pyridine, th e magnitudes of specific interaction enthalpies for PCl3, PBr3, (EtO)( 2)PCl, GRAPHICS PCl and GRAPHICS PBr were determinated. Thermodyna mic parameters of complex formation between cyclic chlorophosphites an d 1-dimethylamino-3,3-dimethyl-propan-2-on have been obtained and are discussed.