Bromo(ethyl)hydridobis(3,4-dimethylpyridine-N)silicon Bromide at 173K

In aprotic solvents, dibromoethylsilane (HSiEtBr₂) and 3,4-dimethylpyridine form a 1:2 crystalline complex which is stable at room temperature. X-ray structure analysis reveals an [HSiEtBr(3,4-dimethylpyridine)₂]⁺ (C₁₆H₂₄BrN₂Si⁺.Br^-) complex, with one Br^- ion in the outer coordination sphere. The ligands bound directly to the silicon centre exhibit almost trigonal-bipyramidal geometry. The geometry of the title compound compares well with that of bromo(hydrido)methylbis(4-methylpyridine-N)silicon bromide.

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