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  • Inorganic Chemistry  (1)
  • Industrial Chemistry
  • crystal structure
  • 1980-1984  (1)
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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Kristallstrukturen der Titelkomplexe, deren einer zwei verschiedene Carbonylmetall-Einheiten, deren anderer zwei verschiedene Brückenliganden besitzt, wurden bestimmt. Die Stereochemie des Cr—Ni-Komplexes entspricht der Erwartung, seine Metall - Metall-Bindung ist jedoch kürzer als der Durchschnittswert aus den entsprechenden Cr2- bzw. Ni2-Verbindungen. Bei dem Fe2-Komplex ist die Gesamt-Molekülgeometrie ebenfalls normal, doch der Metall - Metall-Abstand ist deutlich kürzer als erwartet. Die Verkürzung der Metall - Metall-Bindungen steht bei beiden Komplexen in Zusammenhang mit der Minimisierung der intramolekularen sterischen Hinderung.Stereochemistry of the Metal - Metal Bond.Structures of the Compounds (CO)4Cr[μ-PMe2]2Ni(CO)2 and (CO)3Fe[μ-PMe2, μ-I]Fe(CO)3. Each with Two Different Complex HalvesThe crystal structures of the title complexes, one of which has two different carbonylmetal units and the other has two different bridging ligands, were determined. The stereochemistry of the Cr—Ni complex is as expected, its metal - metal bond however is shorter than the average value of the corresponding Cr2 and Ni2 compounds. For the Fe2 complex the overall molecular geometry is also normal, but the metal - metal distance is considerably shorter than expected. The shortening of the metal - metal bonds is in both complexes correlated with the minimization of intramolecular steric strain.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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