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'Tungsten Alkyne Complexes' in keywords Facet   Publication Year 1993  [X]
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1Author    Michael Plate, Peter Hofacker, WernerM. Assa, Birgit Schwarz, Bernhard Neumüller, Kurt DehnickeRequires cookie*
 Title    Synthese und Kristallstrukturen der Wolfram(VI)-Alkinkomplexe |WCl4(P h -C = C -I)(T H F )l und [WCl4( P h -C = C -T e -C 4H9)(THF)| Synthesis and Crystal Structures o f the Tungsten(VI) Alkyne Complexes [WCl4(P h -C = C -I)(T H F )] and [WCl4( P h -C = C -T e -C 4H 9)(THF)]  
 Abstract    [WCl4(P h -C = C -I)(T H F)] has been prepared by the reaction o f mrns-[WCl4(SEt2)2] with P h -C = C -I in TH F solution, whereas [WCl4(P h -C = C -T e -n C 4H 9)(THF)] has been syn­ thesized by the reaction o f P h -C = C -T e -« C 4H 9 with tungsten hexacloride in the presence o f C2C14 and THF. Both complexes were characterized by IR spectroscopy and by crystal struc­ ture determinations. [WCl4(P h -C = C -I)(T H F)]: Space group P 2,/c, Z = 4, 2617 observed unique reflections, R = 0.064. Lattice dimensions at -7 0 °C: a = 1518.2(3), b = 714.5(1), c = 1540.0(3) pm, ß = 90.09(3)°. [WCl4(P h -C = C -T e -« C 4H9)(TH F)]. Space group P 1, Z = 2, 3911 observed unique reflec­ tions, R = 0.067. Lattice dimensions at 20 °C: a = 844.0(3), b = 974.6(4), c = 1002.4(3) pm, a = 76.00(4),/? = 105.14(1), y = 82.03(3)°. Both complexes have molecular structures, in which the tungsten atom s are seven-coordi­ nate by four chlorine ligands, by the two alkyne carbon atom s, and in trans position to the latter by the oxygen atom o f the T H F molecule. The WC bond lengths are 198 and 200(1) in the telluro complex and 206 and 196(1) pm in the iodine derivative. 
  Reference    Z. Naturforsch. 48b, 1105—1111 (1993); eingegangen am 21. April 1993 
  Published    1993 
  Keywords    Tungsten Alkyne Complexes, Synthesis, IR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1105.pdf 
 Identifier    ZNB-1993-48b-1105 
 Volume    48