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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 633-636 
    ISSN: 0044-2313
    Keywords: Tetrakis-(N-methylimidazolium)-silacyclopentane-dichloride · 2 NMI ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure Determination of Tetrakis-(N-Methylimidazolium)-silacyclopentanedichloride · 2 NMIThe reaction of 1,1-dichlorosilacyclopentane with N-methylimidazole in aprotic solvents leads to a 1 : 4 compound, stable at room temperature. The silicon-center of the resulting dication enlarges the coordination number from four to six. Therefore we find the chloride-ions removed from the first area of coordination. They have lost their bonding to the silicon atom. This species is the first Lewisacid/base compound consisting of a heterocyclic alkylsilicon-halide and a nitrogen-base. Two single NMI-molecules per dication are present in the unit cell with no coordination at all. That leads to an exact 1 : 6-ratio of silane to base.
    Notes: 1,1-Dichlorsilacyclopentan reagiert unter Anlagerung von vier N-Methylimidazol (NMI)-Molekülen in aprotischer Lösung zu einem sechsfach koordinierten Siliciumdikation, bie dem beiden Chloridionen aus der ersten Koordinationssphäre verdrängt werden. Hier liegt der erste Verbindungstyp eines Lewis-Säure/Lewis-Base-Adduktes bestehend aus einem heterocyclischen Alkylhalogensilan mit einer Stickstoffbase vor. Zwei weitere NMI-Moleküle befinden sich pro Dikation in der Elementarzelle, was einem exakten Verhältnis von Silan zu NMI von 1 : 6 entspricht.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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