Vibrational Spectra of IF7 and ReF7

Abstract

Raman spectra of IF7 and ReF7 have been observed for the first time in the vapor state. Infrared spectra of the vapors have also been re-examined. Earlier difficulties regarding possible coincidences in the IF7 spectra have been removed. The data suggest that both molecules belong to symmetry group D5h, although there are some significant as yet unexplained differences between them.