Synthesis and infrared studies of Methylgallium(III) and Gallium(III) Complexes with Tridentate Ligands

Several new 1:1 complexes, neutral or anionic, formed by Methylgallium(III) and Gallium(III) with tridentate ligands (H₂L; ONO and SNO donor atoms), as well as a glycylglycine derivative, have been synthesized, and characterized in the solid state by infrared spectroscopy. Data have been interpreted in terms of trigonal bipyramidal type configurations of the environment of the metal centre, in the complex anions Cl₂GaL]^? as well as in compounds CH₃GaL and ClGaL: in the latter two, dimerization would occur through bridging, three-coordinating oxygen atoms.