MOLECULAR STRUCTURE OF PC1F4: INFRARED SPECTRUM, LOW-TEMPERATURE RAMAN SPECTRUM, AND GAS-PHASE DIPOLE MOMENT: PENTACOORDINATED MOLECULES. IX

Abstract

Abstract The vapor-state infrared spectrum (2000-250 cm−1) and liquid-state Raman displacements (Δv = 501200 cm−1) of PClF4 are reported. The vapor-state electric dipole moment of PClF4 was obtained from a study of the temperature variation of the dielectric constant over the range - 68° to - 2°. The resulting value is 0.78 ± 0.01 D. The induced polarization is 13.7 ± 0.4 cc. Interpretation of the vibrational data as well as the dielectric data and 35C1 pure quadrupole resonance frequency support the conclusion that the structure of PClF4 is a trigonal bipyramid (C 2v point group) with the chlorine atom located at an equatorial site.