Go toArchive
Browse byFacets
Bookbag ( 0 )
'Synthesis' in keywords Facet   Publication Year 1994  [X]
Results  21 Items
Sorted by   
Publication Year
21Author    Peter Dierkes, Kurt Dehnicke, Dieter FenskeRequires cookie*
 Title    Diinkomplexe  
 Abstract    von Wolfram(VI). D ie Kristallstruktur von [(Et2S)WCl4(Me3S i-C = C -(C H 2)4 -C = C -S iM e 3)WCl4(SEt2)] Diyne Complexes of Tungsten(VI). The Crystal Structure of [(Et2 S)WCl4 (M e3Si -C = C -(C H 2)4-C ^ C -SiMe3) WCl4 (SEt2)] The diyne complexes [(Et2S)W C l4(R -C ^ C -(C H 2)" -C = C -R)W C l4(SEt2)] (R = SiM e3, n = 3, 4, 8; R = C6H 5, n = 4, 8) have been prepared by the reaction o f /rarcs-[WCl4(SEt2)2] with the corresponding diyne in toluene solutions. The com plexes form green or orange, diamagne­ tic, moisture sensitive crystal powders, which were characterized by their IR and 13C NM R spec­ tra. The crystal structure of the com plex with R = SiM e3 and n = 4 has been determined. [(Et2S)WCl4(M e3S i-C = C -(C H 2)4-C = C -S iM e 3)W Cl4(SE t2)]: Space group P2j/c, Z -2, 3620 observed unique reflections with I>2a(I), R = 0.027. Lattice dimensions at -7 0 °C: a -1431.8(11), b -839.6(8), c = 1731.3(11) pm, ß = 112.74(2)°. The structure consists o f m ole­ cules in which both tungsten atom s are surrounded by four chlorine atoms in equatorial positions, both alkyne groups are bonded side on (rj2) to the tungsten atoms, whereas the sulfur atoms of the diethylsulfide molecules are located trans to the alkyne groups. 
  Reference    Z. Naturforsch. 49b, 1391—1396 (1994); eingegangen am 17. Mai 1994 
  Published    1994 
  Keywords    Diyne Complexes of Tungsten(VI), Synthesis, IR Spectra, NM R Spectra, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1391.pdf 
 Identifier    ZNB-1994-49b-1391 
 Volume    49