ON THE CHEMISTRY OF GALLIUM COMPOUNDS .II. PREPARATION AND STRUCTURE OF BIS[2,2,6,6-TETRAMETHYLPIPERIDINO)[TRIS(TRIMETHYLSILYL)SILYL]GALLIUM - FIRST EXAMPLE FOR A MONOMERIC BIS(AMINO)GALLANE WITH GALLIUM-SILICON BOND

The title compound tmp(2)GaSi(SiMe(3))(3) (4) (tmp = 2,2,6,6-tetrameihylpiperidino) was prepared by the reaction of (Me(3)Si)(3)SiLi . 3 THF (2) with tmp(2)GaCl (3). The NMR data (H-1, C-13, Si-29) and the crystal structure of 4 are discussed. It contains a trigonal planar-coordinated gallium atom with long Ga-N and Ga-Si bonds of 191 and 247 pm, respectively. This compound is the first fully characterized monomeric gallium bis(amide) and the second structurally investigated compound with a gallium-silicon bond.