SYNTHESES OF 2,2-DIPHENYLETHYL-SUBSTITUTE D SILANES - MOLECULAR-STRUCTURE OF TRICHLORO-2,2-DIPHENYLETHYLSILANE

Hydrosilylation of 1,1-diphenylethylene with trichlorosilane leads in high yields to trichloro-2,2-diphenylethylsilane (1), which was invest igated spectroscopically as well as by X-ray structure determination. The compound crystallizes monoclinically in the acentric space group C c {a = 1002.4, b = 1573.8, c = 979.7 pm, beta = 106.27 degrees, Z = 4} ; the bonding parameters show no special features. By fluorination wit h zinc(II) fluoride in diethylether and by reduction with ''Red-Al'' i n toluene, the corresponding SiF3 (2) and SiH3 derivatives (3) are rec eived, respectively.