Coordination complexes of gallium(III) and indium(III) halides. II. Far-infrared spectra of gallium(III) halide complexes with triarylphosphines

Infrared spectra of some triarylphosphine and diphosphine complexes of gallium (III) chloride, bromide, and iodide have been recorded in the range 600–200 cm−1 and assignments of gallium–halogen stretching vibrations made. The number and frequencies of the ν (Ga–X) vibrations are consistent with monomeric structures for the triarylphosphine complexes in the solid state. Possible structures for the diphosphine complexes are discussed.