Komplexe gemischter Siliciumhalogenide mit 3,4-Lutidin / Complexes of Mixed Silicon Halides with 3,4-Lutidine

Abstract

The first single crystal X-ray investigations of 3,4-lutidine complexes with mixed silicon tetrahalides were carried out. Einleitung

Stable Hexacoordinated Neutral Complexes between Silyl Halides and Two Water or Two Ammonia Molecules: SiX4Y2 (X = H, F, Cl; Y = H2O, NH3)

“…Both 15 and 13 have comparatively short SiN bonds, but the SiN bond lengths in 14 are the shortest among chlorosilanediammonia complexes. This is in agreement with the shortening of the experimental SiN bond lengths in going from SiH 2 Cl 2 (2.016 Å with dimethylpyridine 16 ) to SiCl 4 (1.984 Å with methylpyridine, 17 1.990 Å with dimethylpyridine 18 ). D. Complexes of Two Water Molecules with Tetrafluoro and Tetrachlorosilanes.…”

“…The first X-ray diffraction studies of molecular crystals formed as complexes of two pyridine molecules with SiF 4 and SiCl 4 have shown that these complexes have a centrosymmetric octahedral configuration with the pyridine molecules in axial positions. Recently, this structure was confirmed by X-ray studies of complexes of SiH 2 Cl 2 , and silicon tetrahalides with methyl and dimethylpyridines. , All these structures and those described in our previous study 1 are characterized by octahedral coordination of the H, Hal, O, and N atoms around silicon and comparatively short Si−N bonds (ca. 2 Å).…”

“…Recently, this structure was confirmed by X-ray studies of complexes of SiH 2 Cl 2 15,16 and silicon tetrahalides with methyl and dimethylpyridines. 17,18 All these structures and those described in our previous study 1 are characterized by octahedral coordination of the H, Hal, O, and N atoms around silicon and comparatively short Si-N bonds (ca. 2 Å).…”

The addition-reaction product of 1,1,1,4,4,4-hexachloro-1,4-disilabutane withN-methylimidazole

“…In contrast, until now, only neutral addition complexes, e.g. dichlorobis(pyridine)silane (Hensen, Stumpf et al, 1998), tetrachlorobis(4-methylpyridine)silicon and tetrachlorobis(3,4-dimethylpyridine)silicon (Hensen, Mayr-Stein, Spangenberg, Bolte & Ru È hl, 2000), or dicationic complexes, e.g. SiHCl(Nmethylimidazole) 4…”

Complexes of germanium bromides with 4-picoline and 3,4-lutidine

“…In recent years, the extension of the coordination sphere of silicon in complexes with organic nitrogen bases has been the subject of numerous studies (Bechstein et al, 1990;Chuit et al, 1993;Kane et al, 1998;Hensen et al, 1998;Hensen, Mayr-Stein, Spangenberg, Bolte & Ru È hl, 2000). Several complexes of silicon halides are already known, but little is known about adducts of germanium halides (Adley et al, 1972;Bolte et al, 2000) with aromatic nitrogen bases.…”