Benzyl-tris(trimethylsilyl)methyl tin dihalides, {(CH3)(3)Si}(3)C(C6H5-CH2)SnHal(2) with Hal = Cl, Br, I

The tin tetrahalides SnHal(4) (Hal = Cl, Br, I) react with base-free tris(t rimethylsilyl)methyllithium (Tsi-Li) solved in toluene to form the trihalid es Tsi-SnHal(3). But when the reaction is carried out in a 1:2 molar ratio at 60 degrees C in toluene, Tsi-H, Tsi-Hal and benzyl-trisyl tin-dihalides are formed in good yields, respectively. The nmr (H-1, C-13, Si-29, Sn-119) and the Raman spectra are discussed, the X-ray structure analyses of the d ibromide as well as the diiodide have been measured.