THE CRYSTAL STRUCTURES OF PHF4, PH2F3 AND PHF2 - MOLECULAR PACKING MODES AT LOW-TEMPERATURE

The title compounds have been prepared in partly new ways and their cr ystal structures determined. The molecular geometries are found simila r to those of the respective gas phases and those obtained by ab initi o calculations. On the intermolecular level, there are indications of weak hydrogen bonds P-H ... F in all three structures and of likewise weak fluorine bridges P-F ... P in PH2F3 and PHF2 with the latter furt her featuring a close P ... P contact.