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1983 (1)
1Author    CorneliusG. Kreiter, Ulrich KoemmRequires cookie*
 Title    Gehinderte Ligandbewegungen in Übergangsmetallkomplexen, XIX [1] Oktaedrische Wolfram-Olefin-Komplexe mit Bisphospbinoethan-Liganden Hindered Ligand Motions in Transition Metal Complexes, XIX [I] Octahedral Tungsten Olefin Complexes with Bisphosphinoethane Ligands  
 Abstract    (OC-6-32)-W(CO)3[(CH3)2PC2H4P(CH3)2](olefin) complexes (9-14) were prepared photochemicallyfromW(CO)4[(CH3)2PC2H4P(CH3)2](l)viaW(CO)3[(CH3)2PC2H4P(CH3)2]-(THF) (2) and the electron poor olefins dimethyl malonate(3), fumarate (4), methylfuma-rate (5), fiuorofumarate (6), chlorofumarate (7) and bromofumarate (8). The stereoche-mistry of 9-14 was elucidated by IR and NMR spectroscopy. The hindered rotations of the olefin ligands in 9-14 were studied by D-NMR spectroscopy. 11-14 form two diastereomeric isomers when the olefin rotation is freezed. The spectroscopic behaviour of the dimethyl fumarate complex 10 gives unambiguous proof for the rotation of the olefin ligand around the metal-olefin-bond. Alternative motions are ruled out. 
  Reference    Z. Naturforsch. 38b, 943—952 (1983); eingegangen am 7. Februar/15. März 1983 
  Published    1983 
  Keywords    Olefin Complexes, Synthesis, Ligand Rotations 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0943.pdf 
 Identifier    ZNB-1983-38b-0943 
 Volume    38