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21Author    WolfgangA. Herrmann, Ilona SchweizerRequires cookie*
 Title    Übergangsmetall-Methylen-Komplexe, VI [1] Zur irreversiblen -Methylen/Carbonyl-Isomerie zweikerniger Cobalt-Komplexe mit bifunktionellen Methylen-Liganden Transition Metal Methylene Complexes, VI [1] On the Irreversible //-Methylene/Carbonyl Isomerization of Binuclear Cobalt Complexes with Bifunctional Methylene Ligands  
 Abstract    Ethyl diazoacetate (2 a) and £erZ-butyl diazoacetate (2 b) are converted into the metal stabilized, doubly bridging alkoxycarbonyl carbenes upon photolysis with (r? 5 -C5H5)Co(CO)2 (1) in tetrahydrofurane at —110°C. Although the yields of //-dicarbonyl-/(-ethoxy-carbonylmethylene-bis(?7 5 -cyclopentadienylcobalt) (3 a) and the corresponding ieri-butyl derivative (3b) are low, both compounds attract considerable attention due to an un-expected and hitherto unknown irreversible carbonyl bridge opening process with concomitant //-methylene rearrangement. These isomerizations have been established by IR and 1 H NMR methods to be first order intramolecular processes. 
  Reference    Z. Naturforsch. 33b, 1128—1135 (1978); eingegangen am 6. Juli 1978 
  Published    1978 
  Keywords    /<-Alkoxycarbonylmethylene, Terminal/Bridging Carbonyl Groups, Cobalt, IR, X H NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1128.pdf 
 Identifier    ZNB-1978-33b-1128 
 Volume    33 
22Author    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 
23Author    Anne Utzolino, Karsten BluhmRequires cookie*
 Title    Cox 5Ti0 5(B 0 3) 0 and Co! 5Zro.5(B 0 3) 0  
 Abstract    Single crystals of Co15Tio.5(B 0 3)0 (I) and Coj 5Zr0 5(BO3)O (I I) were obtained by a B20 3 flux technique. Both compounds crystallize with orthorhombic symmetry, space group D -Pnma (Nr. 62), I a = 928.1; b = 311.1; c = 940.1 pm; Z = 4 and I I a = 949.5; b = 323.42; c = 934.7 pm; Z = 4. The compounds are isotypic to the mineral warwickite. All metal ions are octahedrally coordinated by oxygen ions. The structure contains isolated, trigonal planar B 0 3 units and oxygen that is not coordinated to boron. Die Synthese und Kristallstruktur von cobalthaltigen Boratoxiden: Coi^Tio,5(B03)0 und C o i?5Zr<),5(B03)0 
  Reference    Z. Naturforsch. 50b, 1653—1657 (1995); eingegangen am 4. Mai 1995 
  Published    1995 
  Keywords    Cobalt, Titanium, Zirconium, Borate Oxide, Crystal Structure, X-Ray 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1653.pdf 
 Identifier    ZNB-1995-50b-1653 
 Volume    50 
24Author    Michael Feist, Sergej Trojanov, Erhard KemnitzRequires cookie*
 Title    Die Kristallstrukturen von 1,4-Dimethylpiperazinium-tetrabromo- cobaltat(II) und -zinkat(II), (dmpipzH2) [Mn Br4] (M = Co, Zn)  
 Abstract    The Crystal Structures of 1,4-Dimethylpiperazinium Tetrabromocobaltate(II) and -Zincate(II), (dmpipzH2) [MHBr4] (M = Co, Zn) The compounds (dmpipzH2)[MnBr4] (M = Co, Zn) crystallize at room temperature from equi-molar solutions of 1,4-dimethylpiperazine and MBr2 • n H20 in 3M HBr. (dmpipzH2)[CoBr4] is isotypic with the homologous chlorometalates of Co and Zn and crystallizes in the mono­ clinic space group P2,/m with a = 6.424(3), b = 14.588(6), c = 7.102(6) A, ß = 90.87(6)°, Z = 2. (dmpipzH2)[ZnBr4], however, crystallizes in the monoclinic space group P2,/c with a = 7,605(5), b = 13,760(9), c = 13,286(7) Ä, ß = 93,03(6)°, Z = 4. Both structures con­ tain centrosymmetric cations (dmpipzH2)2+ in the chair form and slightly distorted tetrahedra [MBr4]2~ with a mirror plane in the case ofM = Co. Several distances N- • -Brin both structures are interpreted in terms of N-H- • Br hydrogen bonds which are favoured by the packing in the case of M = Zn. 
  Reference    (Z. Naturforsch. 51b, 9—13 [1996]; eingegangen am 12. Juni 1995) 
  Published    1996 
  Keywords    1, 4-Dimethylpiperazinium Tetrabromometalates(II), Cobalt, Zinc, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0009.pdf 
 Identifier    ZNB-1996-51b-0009 
 Volume    51 
25Author    Rostislav Lam, ShahramM. Ihanb, Wolfgang BeckbRequires cookie*
 Title    Metallkomplexe mit biologisch wichtigen Liganden, LXXXY [1] Koordinationsverbindungen von Cobalt(III), Iridium(III), Ruthenium(II) und Palladium(II) mit Isoxazol-und Isoxazolin-3-carboxylaten M etal Complexes of Biologically Im portant Ligands, LXXXV [1] Coordination Compounds of C obalt(III), Iridium (III), R uthenium (II) and Palladium(II) with Isoxazole-and Isoxazoline-3-carboxylates  
 Abstract    Chelate complexes of 5-phenyl-isoxazole-3-carboxylate (L 1) and 5-phenyl-isoxazoline-3-carboxylate (L2) ligands were prepared: PdfL 1)-). C p*(C l)Ir(L '), (p-cym ene)(Cl)Ru(L1), Pd(L2)2, (Et3P)(Cl)Pd(L2), C6H4CH 2N M e2Pd(L2)-L 2H, Cp*(I)Co(L2), Cp*(Cl)Ir(L2) (10), and (p-cymene)(Cl)Ru(L2) (Cp* = C5Me5). The structure of 10 was determined by X-ray diffraction. 
  Reference    Z. Naturforsch. 51b, 581—587 (1996); eingegangen am 27. Juli 1995 
  Published    1996 
  Keywords    Isoxazole-3-carboxylate, Isoxazoline-3-carboxylate, Chelate Complexes, Cobalt, Iridium 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0581.pdf 
 Identifier    ZNB-1996-51b-0581 
 Volume    51 
26Author    Katja Heinze, Gottfried Huttner, Laszlo ZsolnaiRequires cookie*
 Title    Tuning the Energy of the NIR Absorption of Dinuclear Triphos-Cobalt-Complexes  
 Abstract    Dinuclear Co(III) complexes of the type [(triphos)Co(C6X2Z' Z2Z3Z4)Co(triphos)]2+ (Z1 ~4 = O, NR, S; R = H, Me; X = H, Cl, Br, I; 1 -62+) have been prepared and characterized by MS, IR, NMR, cyclovoltammetric and UV/VIS/NIR measurements and by X-ray analyses (12+, 3a2+ and 42+). Their redox behaviour and the energy of their low energy LMCT bands was studied and compared to the properties of the mononuclear complexes [(triphos)Co(C6H4Z 'Z 2)]+ (Z1-2 = O, NH, S). 
  Reference    Z. Naturforsch. 54b, 1147—1154 (1999); received June 2 1999 
  Published    1999 
  Keywords    Dinuclear Complexes, NIR Dyes, Cobalt, Tripodal Ligands, Bridging Ligands 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1147.pdf 
 Identifier    ZNB-1999-54b-1147 
 Volume    54 
27Author    Silke Buchler, Franc Meyer, Albrecht Jacobi, Peter Kircher, Laszlo ZsolnaiRequires cookie*
 Title    Novel Dinucleating Ligand Systems Containing Two Adjacent Coordination Compartments of the Potential Triamidoamine-Type -Nickel(II) and Cobalt(II) Coordination Chemistry  
 Abstract    The preparation of novel dinucleating pyrazolate ligands H5L3 -H5L8 carrying chelating side arms with appending secondary amine functions is reported. Following different synthetic routes, either CH2CF3, C6H2F3 , or CftF? moieties can be introduced as substituents at the termi­ nal nitrogen atoms. These systems are reminiscent of two coupled coordination compartments of the potential triamidoamine-type. Crystallographic analyses of a series of bimetallic complexes of the CH2CF3-substituted ligand H5L4 with NiCh and C0 CI2 reveal manifold coordination modes in the solid state, resulting from the facile detachment of a single or several N-donor sites from the metal centers. Coordination number sets {4/6} (in H5L4Co2CU) and {5/6} (in H4L4Ni2Cl3, H4L4Co2Cl3 and H5L4Ni2CL) are thus observed. In the non-deprotonated HsL-type systems the remaining protons are found to be scavenged by a pyrazolate-N (in H5L4Ni2CU) or an amine function of a ligand side arm (in H ^ C o iC U). 
  Reference    Z. Naturforsch. 54b, 1295—1306 (1999); received June 18 1999 
  Published    1999 
  Keywords    Dinuclear Complexes, N-Ligands, Nickel, Cobalt, Solid-State Structures 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1295.pdf 
 Identifier    ZNB-1999-54b-1295 
 Volume    54