Etude spectroscopique du role des liaisons P F et P O pontes dans les composes oxyfluores du phosphore V. Cas de P2O3F4 et de K2P2O5F2.

Abstract

The compounds P 0 F 2 3 4 and K2P205F2 have been studied by vibrational spectroscopy. From the shifts of the symmetric vibration of the terminal PO bonds it appears that the molecular structure contracts as the number of PO (bridged) and/or PF bonds increases. The changes occur at the expense of PO terminal bonds. In these tetrahedral phosphorus (V) compounds the FO (bridged) and PF bonding have a similar role, and the same phencnenon occurs in sulfur VI oxide fluoride compounds.