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1Author    Ceyhan Kayran, Pazilaiti RouziRequires cookie*
 Title    Thermal Catalytic Hydrosilylation of Conjugated Dienes with Triethylsilane in the Presence of Tricarbonyl(o-xylene)Metal (Metal = Cr, Mo, W) Complexes  
 Abstract    The thermal catalytic hydrosilylation of 1,3-butadiene (1), rra«5-2-methyl-l,3-pentadiene 
  Reference    Z. Naturforsch. 56b, 1138—1142 (2001); received July 2 2001 
  Published    2001 
  Keywords    Hydrosilylation, Tungsten, Carbonyl 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1138.pdf 
 Identifier    ZNB-2001-56b-1138 
 Volume    56 
2Author    NicholasC. Norman, PeterM. WebsterRequires cookie*
 Title    The Synthesis of Some Cyclopentadienyliron-Indium Complexes  
 Abstract    Treatm ent o f indium trichloride with three equivalents of the cyclopentadienyliron carbonyl anions, [F e(C O)2(?7-C5H 4R)] (R = H, Me) affords the tri-iron indium com plexes [In {F e(C O)2(//-C 5H 4R)},] (R = H. Me) as dark red crystalline materials. Both com pounds were characterized by spectroscopic and analytical methods. Infrared spectroscopy indicates that both com plexes are undissociated in solution in contrast to previously reported analogous m olybdenum containing species. 
  Reference    (Z. Naturforsch. 44b, 91 [1989]; received August 9. 1988) 
  Published    1989 
  Keywords    Synthesis Iron, Indium, Cyclopentadienyl, Carbonyl 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0091.pdf 
 Identifier    ZNB-1989-44b-0091 
 Volume    44 
3Author    PeterG. JonesRequires cookie*
 Title      
 Abstract    The crystal structure of (OC)AuCl has been determined and refined to R 0.037 (space group Cmem, a = 407.1(1), b = 1042.2(4), c —532.1(3) pm, Z =4). The structure consists of discrete, exactly linear molecules; all atoms lie on the special positions 0, y, 1/4. The bond lengths involving the light atoms are affected by libration. The shortest Au — Au contacts between molecules are 338 pm. 
  Reference    Z. Naturforsch. 37b, 823—824 (1982); received March 8 1982 
  Published    1982 
  Keywords    Crystal Structure, Carbonyl, Gold(I) 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0823.pdf 
 Identifier    ZNB-1982-37b-0823 
 Volume    37 
4Author    Saim Özkar, Zahide ÖzerRequires cookie*
 Title    3C NMR Spectroscopic Study of Pentacarbonylacetonitrilemetal(O) Complexes of the Group 6 B Elements  
 Abstract    The com plexes M (CO)5(C H 3C N) (M: Cr, M o, W) were obtained from the substitution o f TH F in M (C O)5(TH F) which has been generated by photolysis o f M(CO)6 in T H F and characterized by using IR , 'H N M R and l3C N M R spectrosco­ pies. The acetonitrile ligand is found to be N -bonded to the M (CO)5-moiety with a local C4v-symmetry. The effect o f the acetonitrile ligand on the metal-carbonyl bonding was discussed in terms o f l3C N M R chemical shifts. 
  Reference    Z. Naturforsch. 48b, 1431 (1993); received M ay 17 1993 
  Published    1993 
  Keywords    Chromium, M olybdenum, Tungsten, Carbonyl, Acetonitrile 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1431_n.pdf 
 Identifier    ZNB-1993-48b-1431_n 
 Volume    48 
5Author    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 
6Author    Ating Giirkan, AhmetM. Yilmaz, Saim Önal, ÖzkarRequires cookie*
 Title    Electrochemical Study of Tricarbonyl(y;6-cyclooctatetraene)metal(0) Complexes of the Group 6 Elements  
 Abstract    Tricarbonyl(?76-cyclooctatetraene)metal(0) complexes of the group 6 elements were prepared by using the procedures described in the literature with some minor modifications and identi­ fied by IR and NMR spectroscopy. Their electrochemical behavior was studied by using cyclic voltammetry in dichloromethane solution containing 0.1 M tetrabutylammonium tetrafiuorob-orate as supporting electrolyte. Their oxidation and reduction potentials were measured and discussed in terms of the frontier energy levels in connection with the UV-Visible electronic ab­ sorption spectral data. In order to elucidate the mechanism of electrooxidation of the complexes, constant potential electrolysis was performed for one representative example, tricarbonyl(^6-cyclooctatetraene)chromium(O). The IR monitoring of the reaction showed that it is gradually converted to hexacarbonylchromium(O) upon electrolysis at constant potential. 
  Reference    Z. Naturforsch. 53b, 875—880 (1998); received March 9 1998 
  Published    1998 
  Keywords    Carbonyl, Chromium, Molybdenum, Tungsten, Cyclic Voltammetry 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0875.pdf 
 Identifier    ZNB-1998-53b-0875 
 Volume    53 
7Author    KlausR. Pörschke, Richard MynottRequires cookie*
 Title    Bis(dimethyIphosphino)methan-Nickel(0)-Komplexe Bis(dimethylphosphino)methane-Nickel(0) Complexes  
 Abstract    The reaction of tris(ethene)nickel(0) with stoichiometric amounts of bis(dimethylphos-phino)methane (dmpm) in ether at low temperature affords the yellow crystalline, dinuclear complexes (dmpm)Ni 2 (QH 4) 4 (1) and (dmpm)2Ni 2 (C 2 H 4)2 (2). 2 reacts with ethyne to yield (dmpm) 2 Ni 2 (C 2 H 2) 2 (3). When 2 is treated with CO at —40 °C the primary product is (dmpm) 2 Ni 2 (CÖ) 2 (w-CO) (4). At 20 °C 4 is converted by additional CO into (dmpm) 2 Ni 2 (CO) 4 (5), which has already been characterized as the reaction product of Ni(CO) 4 with dmpm. In compounds 1—5 the bidentate dmpm acts as a bridging and not as a chelating ligand. The structures of complexes 1—4 were assigned on the basis of their 13 C and 31 P NMR spectra. 
  Reference    Z. Naturforsch. 42b, 421—424 (1987); eingegangen am 9. August 1986 
  Published    1987 
  Keywords    Carbonyl, Ethyne, Nickel(O), Phosphane, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0421.pdf 
 Identifier    ZNB-1987-42b-0421 
 Volume    42 
8Author    Peter KlüfersRequires cookie*
 Title    Die Kristall-und Molekülstrukturen der  
 Abstract    Verbindungen [Cl4_xSn{C o(C O)4}xl mit x = 1 ,2 und 3 The Crystal and M olecular Structures of the Compounds [Cl4_vSn{Co(CO)4} v] with x = 1,2 and 3 The crystal structures o f the com pounds [Cl3SnCo(CO)4] 1, [Cl2Sn{C o(C O)4} 2] 2, and [C lSn{C o(C O)4}3] 3, have been determined by X-ray crystallography. Sn is co-ordinated 
  Reference    Z. Naturforsch. 46b, 187—191 (1991); eingegangen am 16. Juli 1990 
  Published    1991 
  Keywords    Tetracarbonylcobaltio-chloro-stannanes, Tin, Cobalt, Carbonyl, X -R ay Structure 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-0187.pdf 
 Identifier    ZNB-1991-46b-0187 
 Volume    46 
9Author    PaulK. Baker3, DavidJ M Uldoona, MichaelB. Hursthouseb, SimonJ. Colesb, AidanJ. Laveryc, Andrew ShawcrosscRequires cookie*
 Title    The Crystal Structure and Low Temperature 13C NMR Spectrum of the Seven-Coordinate Complex of Tungsten(II), [WI2(CO)3(NCPh)2]  
 Abstract    The crystal structure of [WI2(C O)3(N C Ph)2] (1) has been determined by X-ray methods. The crystals are orthorhombic, space group Pnam, a = 7.815(3), b = 13.839(5), c = 18.475(3) Ä, Z = 8, R -0.0346 for 1497 observed data. The complex [WI2(C O)3(NCPh)2] has a seven-coordinate geometry, which may be described as a distorted capped octahedron, with the two iodo-ligands mutually trans, while each nitrile is trans to a carbonyl group. The capped octahedral geometry consists of a capping carbonyl (C(10)} on the face defined by 1(1), C(20) and C(20)#. However, the geom etry may also be described as a capped trigonal prism, which has one triangular face occupied by three carbonyl groups and the second triangular face occupied by N (l) , N (l)# and 1(1) atoms, respectively. The iodide 1(2) occupies the capping position on the rectangular face defined by the atoms C(20), C(20)#, N (l), and N (l)# . The low temperature 13C NM R spectrum (203 K, C D 2C12) of 1 shows a single carbonyl resonance at 219.27 ppm which indicates that the com plex is undergoing a rapid fluxional process in solution at 203 K. 
  Reference    Z. Naturforsch. 51b, 263 (1996); received July 7 1995 
  Published    1996 
  Keywords    Crystal Structure, Benzonitrile, Carbonyl, D iiodo, Tungsten(II) 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0263.pdf 
 Identifier    ZNB-1996-51b-0263 
 Volume    51