Stable Trichlorosilane–Pyridine Adducts

The prepapration, and first comprehensive spectroscopic and structural characterization of octahedral trichlorosilane adducts HSiCl3(Rpy)2 with R = H, 4‐CH3, 4‐C6H5, 3‐Br, 4‐CHCH2, 4‐C2H5, 4‐C(CH3)3 and 4‐N(CH3)2 is reported. The products are surprisingly stable in the solid state and easily obtained in high yield. Single‐crystal X‐ray diffraction analysis of HSiCl3(3‐Brpy)2 revealed relatively short Si–Cl bonds (218–223 pm) while the Si–N bonds (ca. 198 pm) are only slightly longer than in the corresponding H2SiCl2(Rpy)2adducts. Dismutation reactions were observed only in polar solvents at elevated temperatures.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)