MATRIX-ISOLATION INVESTIGATION OF THE REACTION-PRODUCTS OF TRIMETHYLGALLIUM WITH CH3OH, CH3SH AND H2S

The 1:1 molecular adducts of trimethylgallium with methanol, methaneth iol and hydrogen sulfide were isolated and characterized for the first time using the matrix isolation technique with FT-IR detection. Spect ral analysis showed these adducts to be less strongly bound than the c omplexes of (CH3)(3)Ga with the group VI dimethyl compounds (e.g. (CH3 )(2)O). Evidence was obtained for loss of the C-3 symmetry axis in the complex, as well as for a distortion from planarity of the GaC3 skele ton. Spectral shifts upon complex formation for these complexes, and t hose studied previously, correlate well with the proton affinity of th e base subunit in the complex.