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'M olybdenum' in keywords Facet   section ZfN Section B  [X]
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1Author    Dieter Sellmann+, W. Olfgang Kern, Adelgunde Holzmeier, Georg Pöhlmann, M. Atthias, MollRequires cookie*
 Title    Übergangsmetallkomplexe mit Schwefelliganden, LXVI  
 Abstract    Substitutions-und Additionsreaktionen an Molybdän-und Wolfram-Schwefel-Zentren von |M (Cl)(NO)('S4)], M = Mo, W, mit Thiolaten SR" (R = Me, 'Pr, w Bu, Ph) und PM e3 ('S4'2-= l,2-Bis(2-mercaptophenylthio)ethan(2-)) Transition M etal Complexes with Sulfur Ligands, LXVI* Substitution and A ddition Reactions at M olybdenum and Tungsten Sulfur Centres of [M(Cl)(NO)('S4')], M = M o, W, with Thiolates SR " (R = Me, 'Pr, "Bu, Ph) and PM e3('S4'2~ = l,2-Bis(2-mercaptophenylthio)ethane(2-)) Since substrate addition and elim ination reactions are essential reactions o f metal sulfur centres in oxidoreductases, we investigated the substitution o f chloride in [Mo(C1)(NO)('S4')](1) ('S4'2-= l,2-Bis(2-m ercaptophenylthio)ethane(2-)) [4] and in the anal­ ogous tungsten complex [W (Cl)(NO)('S4')](2). The chloride ligands in 1 and 2 can easily be substituted by thiolates to give [M (SR)(NO)('S4')] (M = M o, R = Me 3a, 'Pr 3b, "Bu 3c, Ph 3d; M = W, R = Me 4 a , Ph 4b). For these substitution reactions an associative mechanism is suggested. The SR~ ligands act probably as o-n four electron donor ligands to give metal centres with an 18 electron configuration as also found in the amido complexes [M o(N R 2)(NO)('S4')] [4]. 1 and 2 react with PM e3 to yield the adducts [M(PMe3)(Cl)(NO)('S4')] (M = Mo 5, W 6), w hose N M R spectra indicate the formation o f two stereoisomers in a ratio o f about 2:3. 
  Reference    Z. Naturforsch. 46b, 1349—1356 (1991); eingegangen am 28. Januar 1991 
  Published    1991 
  Keywords    Sulfur Complexes, Synthesis, Reactions, Stereochemistry, M olybdenum, Tungsten 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1349.pdf 
 Identifier    ZNB-1991-46b-1349 
 Volume    46 
2Author    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 
3Author    O. Sedello, Hk Müller-BuschbaumRequires cookie*
 Title    Ein Oxometallat mit eindimensional flächenverknüpften Oktaederketten Synthesis and Crystal Structure of (C u,Fe)363M o3O i2. An Oxom etallate Showing One-Dimensional Chains of Face Sharing Octahedra  
 Abstract    Single crystals of (C u ,F e)3-63M o30 12 have been prepared by crystallisation from melts. X-ray investigations lead to orthorhombic symmetry, space group D : 2-P 2 12121, a = 5.0952(8), b = 10.637(2), c = 17.881(3) A , Z = 4. (C u ,F e)363M o3O i2 is isotypic to Cu385M o30 12 or (C u,Z n)3 75M o30 12. M olybdenum shows tetrahedral coordination by oxygen. Cu+ and Fe2+ are probably distributed statistically over four different point positions. Interesting features of the crystal structure are one-dim ensional chains of face shared (C u ,F e)0 6 octahedra. S y n t h e s e u n d K r i s t a l l s t r u k t u r v o n (C u , F e) 3 ,63 M o 3 0 12. 
  Reference    (Z. Naturforsch. 51b, 90—9 [1996]; eingegangen am 20. Juni 1995) 
  Published    1996 
  Keywords    Copper, Iron, M olybdenum, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0090.pdf 
 Identifier    ZNB-1996-51b-0090 
 Volume    51 
4Author    Holger Szillat, Hanskarl Müller-BuschbaumRequires cookie*
 Title    Synthese und Kristallstruktur von KCuHo2Mo40 16 Synthesis and Crystal Structure of K C uH o2M o40 I6  
 Abstract    Single crystals o f K C uH o2M o40 16 have been prepared by recrystallisation from melts and investigated by X-ray diffractometer techniques. The compound crystallizes with m onoclinic symmetry, space group C 2/c, a = 521.6(1), b = 1251.3(2), c = 1953.1(2) pm, ß = 92.903(18)°, Z -4. K C uH o2M o40 16 represents a new structure type characterized by H oO s and alternate CuO6/K O 10 polyhedra chains. The connection o f these polyhedra chains to each other and by M o 0 4 tetrahedra is described and the crystal structure discussed with respect to related com ­ pounds o f the C uLnM o2Os and K L nM o20 8 types. 
  Reference    Z. Naturforsch. 49b, 350 (1994); eingegangen am 10. Dezember 1993 
  Published    1994 
  Keywords    Crystal Structure, Copper, H olm ium, M olybdenum, Potassium 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0350.pdf 
 Identifier    ZNB-1994-49b-0350 
 Volume    49