ENERGETICS OF THE TETRACHLOROPHOSPHONIUM CATION, PCL4(-),G, THE HEXACHLOROPHOSPHATE ANION, PCL6(-),G AND METASTABLE PHOSPHORUS (V) CHLORIDE[PCL4(-)][CL-],C()]2[PCL6()
Hdb. Jenkins et al., ENERGETICS OF THE TETRACHLOROPHOSPHONIUM CATION, PCL4(-),G, THE HEXACHLOROPHOSPHATE ANION, PCL6(-),G AND METASTABLE PHOSPHORUS (V) CHLORIDE[PCL4(-)][CL-],C()]2[PCL6(), Polyhedron, 13(9), 1994, pp. 1481-1482
Lattice potential energy calculations made on [PCl4+]2[PCl6-][Cl-] lea
d to an estimate of the lattice energy of this metastable phase of pho
sphorus (V) chloride to be 956 kJ mol-1 (corresponding to 319 kJ mol-1
per PCl5 formula unit). The known stability characteristics of alkali
metal hexachlorophosphates enable the estimation of the enthalpy of f
ormation of PCl6-, g to be in the range: -908 less-than-or-equal-to DE
LTA(f)H0(PCl6-, g) less-than-or-equal-to -896 kJ mol-1, similarly, +39
7 kJ mol-1 greater-than-or-equal-to DELTA(f)H0(PCl4+, g) greater-than-
or-equal-to + 391 kJ mol-1.