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1Author    Th Fetzer, A. Lentz, T. Debaerdemaeker, O. Abou-, El-W AfaRequires cookie*
 Title    Einkristallzüchtung und Röntgenstrukturanalyse des polymeren 1:1-Komplexes zwischen CuCl2 und Pyridazin Crystal Grow th in Gels and X-Ray Characterization of the Polymerie 1:1 -Complex of CuCl2 with Pyridazine  
 Abstract    Single crystals of Cu(pdz)Cl2 were grown by using gel methods with tetramethoxysilane as the gel-forming reagent. Thermal decomposition is interpreted. Crystal data for the com plex: monoclinic, space group C2/c with a -938.3(3) pm, b = 1242.9(3) pm, c = 675.7(4) pm, ß = 128.48(5)°. A crystal structure analysis reveals CuCl2 molecules connected by pyridazine in the form of zigzag-chains. Between these chains there are only Van-der-Waals-Interactions. 
  Reference    Z. Naturforsch. 45b, 199—202 (1990); eingegangen am 28. August 1989 
  Published    1990 
  Keywords    Pyridazine, Copper Complexes, Polymerie Complexes, Gel Crystallization 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-0199.pdf 
 Identifier    ZNB-1990-45b-0199 
 Volume    45 
2Author    Klaus Wasielewski, Rainer MattesRequires cookie*
 Title    Crystal Structure of [CuiCu2ii(CN)4('N 2S')2]SCN ('N 2S' = l-Thia-4,7-diazacyclononane)  
  Reference    Z. Naturforsch. 47b, 1795—1797 (1992); eingegangen am 28. Juli 1992 
  Published    1992 
  Keywords    Copper Complexes, Macrocyclic Ligands, Crystal Structure 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1795_n.pdf 
 Identifier    ZNB-1992-47b-1795_n 
 Volume    47 
3Author    Conny Vogler, Wolfgang Kaim, H.-D HausenRequires cookie*
 Title    Zweikernige Bisphosphankupfer(I)-Komplexe mit dem 2,2 -Bipyrimidin-Brückenliganden: Strukturelle Analogie zu "Blauen" Kupferzentren und Reduktion zu paramagnetischen Spezies Dinuclear Bis(phosphane)copper(I) Complexes with 2,2'-Bipyrimidine as Bridging Ligand: Structural Analogy to " Blue" Copper Centers and Reduction to Paramagnetic Species  
 Abstract    Dinuclear complexes [(PR3)2C u(//:/74-bpym)Cu(PR3)2](BF4)2 with the bis-chelating bridging ligand 2,2'-bipyrimidine (bpym) and various m onodentate and bidentate phosphanes were synthesized via a four com ponent "self assembly" reaction. The reversible electrochemical reduction to m onocationic radical complexes was studied by cyclic voltammetry and electron spin resonance (ESR). Highly resolved ESR spectra revealed the presence o f the bpym anion radical ligand via resolved hyperfine coupling with 'H, 14N , 31P, 63Cu and 65Cu nuclei. The variation o f phosphane ligands was accompanied by significant changes o f electrochemical potentials which were rationalized considering electronic and structural effects. The configura­ tional flexibility o f Cu(I) in this environment is evident from the X-ray crystal structure ana­ lysis o f [(PPh3)2C u(//:^4-bpym)Cu(PPh3)2](BF4)2 H2O C H 3OH for which the coordination at the metal can be described as 3 + 1 (N N'P + P'), qualitatively similar to the (NN'S + S') arrange­ ment around the type 1 Cu centers o f "blue" copper proteins. Intramolecular cooperative n donor/;: acceptor/^ donor "Sandwich" interactions provide parts o f the driving force for this highly distorted coordination geometry which illustrates the proclivity o f Cu(I) towards such an "entatic state" arrangement. 
  Reference    Z. Naturforsch. 48b, 1470—1480 (1993); eingegangen am 5. Mai 1993 
  Published    1993 
  Keywords    Copper Complexes, Structure, Electrochemistry, ESR Spectra, Phosphane Ligands 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1470.pdf 
 Identifier    ZNB-1993-48b-1470 
 Volume    48 
4Author    V. Salas-R, G. Eyesa, Soto-G, C. A. Arridob, Guilera0Requires cookie*
 Title    Synthesis and Characterization of Bis(3-chloro-4-dodecyloxyphenyl) Malondialdehyde Complexes of Cu(II) and Ni(II)  
 Abstract    Bis (3-chloro-4-dodecyloxyphenyl) malondialdehyde copper(II), as well as its nickel(II) homologue have been synthesised. The copper(II) complex shows a narrow (15 °C) nematic phase below its clearing temperature. The nickel(II) complex is polymeric in nature. 
  Reference    Z. Naturforsch. 51b, 1679—1682 (1996); received July 8 1996 
  Published    1996 
  Keywords    Metallomesogens, Liquid Crystals, Copper Complexes, Dialdehydes, Formylation 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1679.pdf 
 Identifier    ZNB-1996-51b-1679 
 Volume    51 
5Author    W. Müncha, L. Walz, M. KönigbRequires cookie*
 Title    Magnetische Eigenschaften von [C u JO C ^ C F ^ N ^ H t^ IN C O ^ im Bereich von 10 bis 240 K Magnetic Properties of [Cu{OCH2CH2N(C4H9)2 }NCO]4 in the Temperature Range from 10 to 240 K  
 Abstract    The magnetic properties of the title compound were re-investigated, since a new phase below 240 K has recently been identified. The exchange parameters were evaluated from the temperature dependence of the magnetic susceptibility with a Heisenberg operator taking into account the high pseudo-symmetry of the tetrameric units observed. 
  Reference    (Z. Naturforsch. 53b, 58—62 [1998]; eingegangen am 16. Oktober 1995 -31. Oktober 1997) 
  Published    1998 
  Keywords    Copper Complexes, Magnetic Properties, Theoretical Calculations 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0058.pdf 
 Identifier    ZNB-1998-53b-0058 
 Volume    53 
6Author    Qianfeng Zhanga, Jinxi Chena, Maochun Hongb, Xinquan Xina, Hoong-Kun FuncRequires cookie*
 Title    Crystal and Molecular Structure of the Copper(I)-thiolate-selenide Complex [Ph4P][Cu(SeS2CNC4H8)(S2CN2C4H8)] with an Unusual Se-S Bond  
 Abstract    Reaction of a DMF solution of Cu(S^CNC4 H8) with [Ph4 P]2 [WSe4 ] affords [Ph4 P b[W Se4 -(CuS2CNC4H8)3 ] (1) and [Ph4P][Cu(SeS2 CNC4 H8)(S2 CN2 C4 H 8)] (2) in which a Se atom from the decomposition of the W Se4 2~ anion has reacted with the pyrrolidyldithiocarbamate (C4 H8dtc) ligand anion to form the new ligand anion SeSiC N C +H s'. Complex 2 crystallizes with four formula units in the monoclinic space group P2\/c in a cell of dimensions a = 10.5824(2), b = 18.7575(3), c = 18.3268(4) A and ß = 109.0980(10)°. 6055 independent reflections above background were measured with a diffractometer and the structure was re­ fined anisotropically to R =0.073. The anion contains a three-coordinated copper(I) atom. The C4 H8 dtcö ligand is bonded to the Cu+ cation in a terminal fashion, while SeS2 CNC4 H8~ chelates the Cu+ cation. The Se-S bond length is 2.231 (4) A. 
  Reference    Z. Naturforsch. 54b, 1313—1317 (1999); received April 4 1999 
  Published    1999 
  Keywords    Crystal Structure, Copper Complex, Selenium Complex, Thiolate Ligand 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1313.pdf 
 Identifier    ZNB-1999-54b-1313 
 Volume    54 
7Author    Dietrich Gudata, AndreasW. Holderberg3, Nikolaus Korberb, Martin Nieger3, Martin Schrott3Requires cookie*
 Title    Bis-phosphonio-isophosphindolide Copper Complexes  
 Abstract    Bis-triphenylphosphonio-isophosphindolide salts 1[X] react with Cu(I)-halides CuX to give isolable products of composition [(l)Cu2X3]. X-ray crystal structure analyses confirmed that for X = Br, Cl dinuclear complexes [(/y-1)(/i-X)Cu2X2] with /i2j;'(P)-bridging cations 1 are formed, while for X = I a solid phase containing a salt (l^lC u*^] and a complex [(l^ C u .^ ] with a terminal ?/(P)-coordinated ligand 1 was obtained. The bonding parameters in the two types of complexes suggest that l i s a hybrid between a phosphenium cation and a phospholide anion whose 7T-system is less nucleophilic than the phosphorus lone-pair.31P NMR studies revealed that in solution in all cases binuclear complexes [(l)Cu2X3] are in dynamic equilibrium with small amounts of mononuclear species and free 1. The same equilibria were detected in the system l[OTf]/CuOTf. NMR studies of ligand exchange reactions indicated that the stability of complexes [(l)Cu2X3] increases in the order X = OTf < 1 < Br, Cl, and titration of [(l)Cu2Bn] with EuNBr allowed to determine the equilibrium constant of the complex formation reaction. 
  Reference    Z. Naturforsch. 54b, 1244—1252 (1999); received July 6 1999 
  Published    1999 
  Keywords    Phosphorus Heterocycles, Copper Complexes, Crystal Structure, '' P NMR Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1244.pdf 
 Identifier    ZNB-1999-54b-1244 
 Volume    54 
8Author    J.-X Boucherle, E. Ressouche, J. Schweizer, B. Gillon, P. ReyRequires cookie*
 Title    Spin Densities in Copper-Nitronyl Nitroxide Complexes  
 Abstract    The spin density in two copper-nitronyl nitroxide complexes, viz. bis(hexafluoroacetylacetonato)-(2,4,4,5,5-pentamethyl-l-oxy-imidazoline 3-oxide)-copper(II) and dichloro-bis(2-phenyl-4,4,5,5-tetra-methyl-l-oxy-imidazoline 3-oxide)-copper(II), has been determined by polarised-neutron diffrac-tion. Spin populations and unpaired electron wave functions have been refined. 
  Reference    Z. Naturforsch. 48a, 120—122 (1993); received February 7 1992 
  Published    1993 
  Keywords    Nitronyl nitroxide free radicals, Copper complexes, Polarised neutron diffraction, Spin density 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0120.pdf 
 Identifier    ZNA-1993-48a-0120 
 Volume    48 
9Author    Conny Vogler, Wolfgang KaimRequires cookie*
 Title    Einkernige Bis(triphenylphospin)kupfer(I)-Komplexe der Bidiazine M ononuclear Bis(triphenylphosphine)copper(I) Complexes of the Bidiazines  
 Abstract    The cationic d 10 metal complexes [(bdz)Cu(PPh3).J+ o f the n accepting bidiazine (bdz) che­ late ligands 3,3'-bipyridazine, 2,2'-bipyrazine, 2,2'-and 4,4'-bipyrimidine were synthesized and compared with the analogous com plex o f 2,2'-bipyridine. The long wavelength metal-to-ligand charge transfer (M LCT) absorption maxima and the reduction potentials indicate relatively little 7i* orbital stabilization by +Cu(PPh3)2. The particular d orbital splitting in a tetrahedral ligand field results in an additional contribution from J , to the energy difference between the first and second MLCT band. Only the most easily reduced com plexes o f 4,4'-bipyrimidine and 2,2'-bipyrazine yield neutral radical complexes ("Cu(0)") which were characterized by ESR spectroscopy. 
  Reference    Z. Naturforsch. 47b, 1057—1062 (1992); eingegangen am 11. März 1992 
  Published    1992 
  Keywords    Copper Complexes, Heterocyclic Ligands, Electrochemistry, Absorption Spectroscopy, ESR Spectra 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1057.pdf 
 Identifier    ZNB-1992-47b-1057 
 Volume    47 
10Author    AndreasF. Stange, Eberhard Waldhör, Michael Moscherosch, Wolfgang KaimRequires cookie*
 Title    Variable Structure of the Cu2S2 Core in Doubly Thiolate-Bridged Dicopper(I) Complexes. An X-Ray Crystallographic, Electrochemical and EPR Study of (dmp)2 (o-CH3 C6H4S)2Cu2 , dmp = 2,9-Dimethyl-l,10-phenanthroline, and a Comment on the Nature of Phenanthroline-Containing "Cu(0)" Complexes  
 Abstract    The molecular and crystal structure of the dicopper(I) complex (dm p)2(M-o-CH3C6H4S)2Cu2 (1), dmp = 2,9-dim ethyl-l,10-phenanthroline, has been deter­ mined. With Cu/S/Cu and S/Cu/S bond angles between 80 and 100°, the planar structure of the central CuSCuS four-membered ring is much more symmetric for 1 as compared to the analogous complex 2 of unsubstituted 1,10-phenanthroline which has a folded Cu2S2 core with bond angles between 67 and 108°. This result illustrates a considerable structural flexi­ bility of the LCu(m-SR)2CuL entity which is being discussed as a possible model for CuA centers of cytochrome c oxidase or nitrous oxide reductase. Oxidation of both com plexes 1 and 2 remains irreversible even at cyclovoltammetric scan rates o f 1 V/s. However, the methyl substitution in complex 1 causes increased reversibility of the electronically coupled dmp-based reduction processes. Accordingly, the EPR spectrum of l -* is characterized by hyper-fine splitting from dmp--and a relatively small 63 " Cu coupling of 0.53 mT. The stabilization of 2,9-disubstituted 1,10-phenanthroline radical anions by coordination to Cu(I) is also dem ­ onstrated by detection of a single broad EPR line at g 2.0028 for the formal "C u(0)" complex Cu(dpp)2 = CuI(dpp_-)(dpp), dpp = 2,9-diphenyl-l,10-phenanthroline. While the EPR signal of Cu(dpp)2 loses intensity on cooling, possibly due to dimerization and spin-pairing, the distorted tetrahedral configuration with essential orthogonal arrangement of dpp jz systems seem s to disfavour an intramolecular electron hopping. 
  Reference    (Z. Naturforsch. 50b, 115—122 [1995]; received July 25 1994) 
  Published    1995 
  Keywords    Crystal Structure, Copper Complexes, Sulfur Ligands, 1, 10-Phenanthrolines, EPR Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0115.pdf 
 Identifier    ZNB-1995-50b-0115 
 Volume    50 
11Author    RolfW. Saalfrank3, Roland Harbig3, Oliver Struck, Frank Hampel3, Eva Maria Petersc, Karl Petersc, HansG. Eorg, Von SchneringcRequires cookie*
 Title    Eindimensionale Kupfer(II)-Koordinationspolymere: Kristall-Engineering durch variable Verknüpfungsmuster [1] One Dimensional Copper(II) Coordination Polymers: Crystal Engineering through Variable Types of Linkage [1]  
 Abstract    of a methanolic copper(II) acetate solution with tetrazolyl enol derivatives 2a or 2b leads to the formation of the corresponding lD-coordination polymer ^[CuL2] 3a and pseudo lD-coordination polymer [CuL2]2 3b, respectively. On the contrary, reaction of 2c with methanolic copper(II) acetate solution yields OH-bridged lD-coordination polymer ^[CuL2(MeOH)2l 3c. Single-crystal X-ray diffraction of the supramolecular species 3 established unequivocally the structures of the stairlike coordination compounds. Reaction of a methanolic copper(II) acetate solution with amidotetrazole derivative 6 leads to the formation of the lD-coordination polymer ^,[CuL2] 7. The structure of 7 has been established by X-ray structure analysis. 
  Reference    (Z. Naturforsch. 52b, 125—134 [1997]; eingegangen am 6. August 1996) 
  Published    1997 
  Keywords    Tetrazolyl Enols, Coordination Polymers ID, Copper Complexes, Self-Assembly, Crystal Engineering Reaction 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0125.pdf 
 Identifier    ZNB-1997-52b-0125 
 Volume    52