John Fawcett, Alan J. Hewitt, John H. Holloway and Michael A. Stephen
J. Chem. Soc., Dalton Trans., 1976, 2422-2424
DOI:
10.1039/DT9760002422,
Paper
Vapour-density determinations on the saturated vapours of NbF5, TaF5, and SbF5 at temperatures above their boiling points have been made by a modified Dumas method. The average molecular weights of the vapour-phase species near the boiling points are close to those for the respective trimers. Approaching 400 °C (or 300 °C for SbF5), however, the major constituent of the vapour is the monomeric pentafluoride.
