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  • Bis(biscyclopentadienylcyanotitanium) oxide  (1)
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    ISSN: 0044-2313
    Keywords: Titanocene cyanides ; Bis(biscyclopentadienylcyanotitanium) oxide ; Crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyanoderivate von Bis(cyclopentadienyl)titan(IV). Kristall- und Molekülstruktur von μ-Oxo-bis[(bis)(cyclopentadienyl)cyanotitan(IV)], [(η5-C5H5)2TiCN]2OBei der Umsetzung von KCN mit Cp2TiCl2 (Cp = μ5-C5H5) in siedendem Methanol entsteht Bis(cyclopentadienyl)methoxytitan(IV)cyanid, Cp2Ti(OCH3)CN, das an der Luft in das dinukleare sauerstoffverbrückte Derivat (Cp2TiCN)2O übergeht. Auf gleiche Weise wurde auch das Bis(methylcyclopentadienyl)analog [MeCp2TiCN]2O erhalten. Die Röntgenstrukturanalyse von (Cp2TiCN)2O ergab, daß die CN-Gruppe als einzähniger Ligand mit einem Abstand Ti—C von 2,158 Å und einem von der Linearität sehr wenig abweichenden Bindungswinkel Ti—C—N (177,7°) fungiert. Der Abstand Ti—O (1,836 Å) und der Bindungswinkel am Brücken-O-Atom (174,1°) sind “normal”. Ti weist eine annähernd tetraedrische Koordination auf. Die Strukturergebnisse werden mit denen analoger zweikerniger Titankomplexe verglichen.
    Notes: By the reaction of KCN with Cp2TiCl2 (Cp = η5-C5H5) in boiling methanol, bis(cyclopentadienyl)-methoxytitanium(IV) cyanide, Cp2Ti(OCH3)CN, is formed which in air is converted into the dinuclear oxygen-bridged derivative (Cp2TiCN)2O. By the same procedure, the bis(methylcyclopentadienyl) analogue [MeCp2TiCN]2O has been obtained. An X-ray diffraction study of (Cp2TiCN)2O has shown that the CN group acts as a unidentate ligand with a Ti—C bond length of 2.158 Å and a Ti—C—N bond angle of 177.7°, very close to linearity. The Ti—O bond distance, 1.836 Å, and the bond angle at the bridging O atom, 174.1°, are normal. The ligands are arranged in a nearly tetrahedral way around the Ti atoms. The structural results are compared to those for similar dinuclear titanium complexes.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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