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'Alkyne Complexes of Molybdenum and Tungsten' in keywords
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1989 (1)
1Author    PeterH. Ofacker, Claus Friebel, Kurt Dehnicke, Petra Bäuml, Wolfgang Hiller, Joachim SträhleRequires cookie*
 Title    Über die Reduktion von Alkinkomplexen des Molybdäns und Wolframs in hohen Oxidationsstufen. Die Kristallstruktur von MoCI3(THF)3 On the Reduction of Alkyne Complexes of M olybdenum and Tungsten in High Oxidation States. The Crystal Structure of MoC13(T H F)3  
 Abstract    The reduction of the tungsten alkyne complexes [WC14(R C = C R)]2 (R — Ph. SiMe3) with cobaltocen in T H F solutions leads to the complexes [CoCp2]2[WCl4(R C = C R)]2 (R = Ph (i); R — SiMe3 (2)), as green, oxygen sensitive crystalline powders. Reduction of [WCl4(M e3SiC =C SiM e3)]2 and of[M oC l4(P hC = C P h)]2 with sodium naphthalide in T H F solutions in the presence of 15-crown-5 gives [Na-15-crown-5]3[W2Cl9], and MoC13(T H F)3, respectively. All compounds have been characterized by IR spectroscopy, and 1 and 2, in addition, by their E PR spectra. The crystal structure of MoC13(T H F)3 was determ ined by X-ray m ethods. Space group P2,/c, Z — 4, 2642 observed unique reflexions, R = 0.050. Lattice dim ensions at 20 °C: a = 888.4(2), b = 1281.5(3), c = 1535.2(3) pm, ß = 92.17(2)°. The com pound forms m onom eric octahedral molecules with a meridional arrangem ent of the ligands. 
  Reference    Z. Naturforsch. 44b, 1161 (1989); eingegangen am 28. Juni 1989 
  Published    1989 
  Keywords    Alkyne Complexes of Molybdenum and Tungsten, R eduction, E PR Spectra, Crystal Structure, IR Spectra 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-1161.pdf 
 Identifier    ZNB-1989-44b-1161 
 Volume    44