An unambiguous assignment for the totally symmetrical phosphorus–indium–phosphorus stretching mode in the five-co-ordinate, trigonal bipyramidal complex indium trichloride–bis(trimethylphosphine) by use of oriented single–crystal Raman polarization data

Abstract

Oriented single-crystal Raman polarization data is used to assign the vibrational spectrum of InCl₃,2PMe₃. A totally symmetrical mode at 135 cm.^–1 is shown to be principally an indium–phosphorus stretching vibration, which may be compared with the analogous indium–nitrogen stretching mode in the isomorphous complex InCl₃,2NMe₃ which occurs at 163 cm.^–1