Far infrared spectra and structure of some complexes of the gallium trihalides

Abstract

The far infrared spectra (20–550 cm.–1) of fifteen 1:1 adducts of the gallium trihalides with ligands containing nitrogen, oxygen, and sulphur as donor atoms have been obtained and interpreted in terms of a monomeric structure L–GaX3 with C3v symmetry. The gallium halide bands exhibit characteristic group frequencies in this region. The positions of the metal–ligand bond vibrations have also been located and these are discussed in relation to the strength of the co-ordinate bond.