Synthesis, NMR spectra and structure of [(CH3)(2)Ga{mu-P(H)Si(CH3)(3)}(2)Ga(CH3)(2){mu-P(Si(CH3)(3))(2)}Ga(CH3)(2)]

The title compound has been prepared in good yield by the reaction of [Me2G aOMe](3) (Me = CH3) with HP(SiMe3)(2) in toluene (ratio 1:1,1) and purified by crystallization from pentane or toluene, respectively. This organogalli um compound forms (Ga-P)(3) ring skeletons with one Ga-P(SiMe3)(2)-Ga and t wo Ga-P(H)SiMe3-Ga bridges and crystallizes in the monoclinic space group C 2/c. The known homologous Al-compound is isotypic, both (M-III-P)(3) hetero cycles have twist-conformations, the ligands of the monophosphane bridges h ave trans arrangements.