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'Tungsten' in keywords Facet   Publication Year 1994  [X]
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1Author    Holger Szillat, Hanskarl Müller-BuschbaumRequires cookie*
 Title    Synthesis and Crystal Structure of Cuq^sH oj 25w 2o 8  
 Abstract    Single crystals of Cu(l.2sHO|.2sW20 8 were prepared by recrystallization from melts and investigated by X-ray diffractometer technique. Cuo^sHoj 25W 2Os crystallizes with m ono­ clinic symmetry, space group C2/c, o -19.123, b -5.613, c = 11.479 Ä , ß = 111.44°. Z = 8. It represents a new structure type characterized by W40 18 groups and Cu+/H o3+ at one point position in statistical distribution. Cu+/H o3+ show an octahedral coordination. A nother point position is occupied by Ho3+ with C. N. = 7. 
  Reference    Z. Naturforsch. 49b, 1145—1149 (1994); eingegangen am 25. März 1994 
  Published    1994 
  Keywords    Crystal Structure Copper Holmium, Tungsten, Oxide 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1145.pdf 
 Identifier    ZNB-1994-49b-1145 
 Volume    49 
2Author    İzzetA. Mour, Saim Ozkar, CorneliusG. KreiterRequires cookie*
 Title    Synthesis and Spectroscopic Studies of Pentacarbonylfumaronitrile-chromium(O), -molybdenum(O), and -tungsten(O)  
 Abstract    Photolysis of hexacarbonyl-chromium(O), -molybdenum(O), and -tungsten(O) in presence of fumaronitrile yields at room tem perature pentacarbonyl-fumaronitrile-chromium(O) (1), -molybdenum(O) (2), and -tungsten(O) (3). The complexes were purified by crystallization and characterized by IR and 13C-NM R spectroscopy. The fumaronitrile ligand is bonded to the M (CO)5 moiety by one nitrile nitrogen atom rather than by the carbon-carbon double bond. In toluene 2 dissociates into fumaronitrile and pentacarbonyl-molybdenum(O), which is stabi­ lized by the solvent. Fumaronitrile and solvated pentacarbonyl-molybdenum(O) exist in solu­ tion together with 2 in an equilibrium which lies in favour of the former species. 
  Reference    Z. Naturforsch. 49b, 1059—1062 (1994); eingegangen am 13. April 1994 
  Published    1994 
  Keywords    Chromium, Molybdenum, Tungsten, Carbonyl, Fumaronitrile Complexes 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1059.pdf 
 Identifier    ZNB-1994-49b-1059 
 Volume    49 
3Author    Josef Ostermeier, Max Heckel, Wolfgang Hiller, FritzR. KreißlRequires cookie*
 Title    Darstellung neuartiger l-Wolframa-2-phospha-3-cyclobuten-4-oI-Verbindungen durch Hydrochlorierung von ?/3-Phosphinoketenkomplexen Synthesis of l-Tungsta-2-phospha-3-cyclobuten-4-ol Complexes by Hydrochlorination of ^3-Phosphinoketene Complexes  
 Abstract    of tungsten Cp(C0)ClW [7/3-P(Ph2)-C (R)= C = 0 ] (R = Me, Ph) react with hydrogen chloride under protonation of the ketene oxygen atom converting the ketene into a new cyclobutenol system. The products have been characterized by ]H, 13C, 31P NM R. IR and mass spectra. l-Carbonyl-l,l-dichloro-l-(?/5-cyclopentadienyl)-2,2-di-phenyl-3-methyl-l-wolframa-2-phospha-3-buten-4-ol crystallized in the monoclinic space group P2\/n with a = 9.046(2), b = 7.369(1), c = 30.266(2)Ä, ß = 96.63(3)° and Z = 4. 
  Reference    Z. Naturforsch. 49b, 1640—1644 (1994); eingegangen am 5. Mai 1994 
  Published    1994 
  Keywords    M etalla-phospha-cyclobutenol, Phosphinoketene Complexes, Hydrochlorination, Tungsten, Posphorus ?;3-Phosphinoketene complexes 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1640.pdf 
 Identifier    ZNB-1994-49b-1640 
 Volume    49