Solid-state studies. Part V. Raman- and infrared-active carbonyl stretching vibrations of three triphenyltin complexes

Abstract

The solid-state Raman- and i.r.-active carbonyl stretching vibrations of pentacarbonylmanganese-, π-cyclopentadienyldicarbonyliron-, and triphenylphosphinetetracarbonylmanganese-triphenyltin have been analysed by use of a new type of symmetry group, called the situs group. Three methods of modifying the crystallographic unit cell to give the vibrational unit cell are outlined. It is shown that even the crystal class of a compound cannot, in general, be inferred from vibrational data.