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'Copper II Complexes' in keywords
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1Author    Joachim Pickardt, Norbert RautenbergRequires cookie*
 Title    Die Kristallstruktur von Hexa- The Crystal Structure of Hexa-^-chloro-/^- oxo-tetrakis [hexamethylenetetraminecopper- (II)], [Cu4Cl60(C6H12Nl)4], a Copper(II) Complex with a Structure Related to that of Beryllium Oxoacetate  
 Abstract    -tetrakis [hexamethy lentetramin -kupfer(II)], [CU4C160(C6H12N4)4], einem Kupfer(II)-Komplex mit Berylliumoxoace-tat-ähnlicher Struktur By reaction of solutions of CuCl2 • 2H20 and hexamethylenetetramine, C6H12N4, in acetone, a complex [Cu4Cl60(C6Hi2N4)] could be ob-tained as single crystals. An X-ray analysis shows that the complex has a structure related to that of basic beryllium acetate. An oxygen atom is tetrahedrally surrounded by four cop-per atoms which, together with six chlorine atoms, form an adamantane-like core. Each copper atom is bonded via a nitrogen atom to a hexamethylenetetramine molecule. 
  Reference    Z. Naturforsch. 37b, 1355—1357 (1982); eingegangen am 28. Juni 1982 
  Published    1982 
  Keywords    Copper(II) Complexes, Chloro Complexes, Hexamethylenetetramine, X-ray 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1355_n.pdf 
 Identifier    ZNB-1982-37b-1355_n 
 Volume    37 
2Author    W. S. Sheldrick, P. BellRequires cookie*
 Title    Interaction of Metal Ions with 7-Deaza-8-aza-and 8-Aza-purines Preparation and X-Ray Structural Analysis of Copper(II) Complexes  
 Abstract    The reaction of 8-aza-and 7-deaza-8-aza-purines with Cu :+ cations in acid solution has been studied. At a pH value of 2, the 8-azaadenine complex [Cu(H 2 0) 4 (AAdH) 2 ](N0 3) 2 (1), which displays Cu-N9 coordination, may be isolated from solution. The reaction of CuCl 2 with 8-aza-hypoxanthine in concentrated HCl solution leads to ring opening at C 2 of the azapurine with subsequent formation of dichlorobis[(5-amino-4-carboxamide)[l — 3]triazole] copper(II) dihydrate 2, in which the triazole ligands display a chelating function, coordinating the metal via N7 and 06. The results for 1 and 2 suggest that copper coordination of the azapurine base is not a prerequisite for opening of the pyrimidine ring. Respectively N9-and N8-coordinated complexes [CUC13(A11H3)]" 3 and [CuCl 2 (H 2 0)(MAllH)] n (4) of allopurinol (A11H 2) and 9-methylallopurinol (MA11H) may be prepared by the reaction of CuCl 2 with the respective bases in HCl solution. In contrast, with the analogous l-methyl-4-aminopyrazolo[3,4-d]pyrimidine MAPP, only the salt (MAPPH)4(CU2C18) (5) could be isolated under similar conditions, indicating that N8 is less attractive as a binding site in this 7-deaza-8-azaadenine derivative. The structures of 1—5 have been established by X-ray structural analysis. A distorted octahedral [4+2]geometry is found for the copper atoms in 1 and 2. Chlorine bridged polymeric chain structures are adopted by the complexes 3 and 4. An intermediate coordination geometry between trigonal bipyramidal and square-pyrami-dal is observed for the metal atoms in 3, a distorted square-pyramidal geometry in 4. 
  Reference    Z. Naturforsch. 42b, 195—202 (1987); received August 18/October 17 1986 
  Published    1987 
  Keywords    8-Azapurines, Allopurinol, Copper(II) Complexes, X-Ray 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0195.pdf 
 Identifier    ZNB-1987-42b-0195 
 Volume    42 
3Author    Jing Shen, Joachim PickardtRequires cookie*
 Title    (Dichloro)-/i-(l  
 Abstract    ,3,5-trithian)kupfer(II), |CuCl2 • € 3^ 8 3 ],, und (Dichloro)-(l,4,7-trithiacyclononan)kupfer(II), ICuCl2 • C6H 12S 3] (Dichloro)-//-(l,3,5-trithiane)copper(II), [CuCl2 • C3H6S3]", and (Dichloro)-(1,4,7-trithiacyclononane)copper(II), [CuCl2 • C6H ,2S3] Reactions of CuCl2 with 1.3.5-trithiane and 1.4.7-trithiacyclononane yield crystals of CuCl2 C3H 6S3, and CuCl2-C6H 12S3, resp. According to X-ray structure analyses, CuCl2-C3H 6S3 forms infinite chains, whereas CuCl2-C6H 12S3 consists o f discrete molecules. In CuCl2 • C3H 6S3 the thioether molecules act as bridging ligands. Each Cu is coordinated to two S atoms belonging to two adjacent ligands, and to two Cl atoms; thus a distorted square planar coordination results. In CuCl2 -C6H 12S3 the Cu is penta-coordinated to the three S atom s o f the ligand and to two Cl atoms. One C u -S bond is significantly longer than the two others; the coordination polyhedron may be regarded as a distorted tetragonal pyramid. 
  Reference    Z. Naturforsch. 47b, 1736—1740 (1992); eingegangen am 20. Juli 1992 
  Published    1992 
  Keywords    Macrocyclic Thioethers, Copper(II) Complexes, Crystal Structure 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1736.pdf 
 Identifier    ZNB-1992-47b-1736 
 Volume    47 
4Author    Vadim Pavlenko, Vladimir Kokozay, Olga BabichRequires cookie*
 Title    Direct Synthesis of Tetranuclear Complexes of Copper(II) with /i4-Bridging Oxygen  
 Abstract    The direct synthesis of a num ber complexes with general composition Cu4OCl6 «(CH 3)2NH-raSolv, where n = 4, m = 0 -2 and Solv = C H 3OH, DMSO, is reported. It is shown by X-ray structure investigation, that in Cu4OCl6-4 (C H 3)2N H the copper atoms are linked by //4-oxygen and //2-chlorine bridging atoms, while molecules of (CH3)2NH are at­ tached to the metal atoms via nitrogen ones. 
  Reference    Z. Naturforsch. 48b, 1321—1324 (1993); received April 22 1993 
  Published    1993 
  Keywords    Direct Synthesis, Copper(II) Complexes, X-Ray 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1321.pdf 
 Identifier    ZNB-1993-48b-1321 
 Volume    48 
5Author    Grit Teschmit3, P. Strauch3, A. Barthelb, J. Reinholdb, R. Kirmse3 'Requires cookie*
 Title    EPR-Einkristall- A Contribution to the Nature of the So-called "Paramagnetic Impurities"  
 Abstract    Untersuchungen an (w-Bu4N)2[Cu(dmit)2] im antiferro­ magnetisch gekoppelten Wirtsgitter (w-Bu4N)2[(dmit)Cu(tto)Cu(dmit)]: Ein Beitrag zur Aufklärung der sogenannten "paramagnetischen Verunreinigung" im Wirtsgitter A Single Crystal EPR Investigation on («-Bu4N)2[Cu(dmit)2] in the Antiferro-magnetically Coupled Host Lattice (n-Bu4N)2[(dmit)Cu(tto)Cu(dmit)]: Single-crystal EPR investigations on the paramagnetic Cu1 1 impurity present in the bi-nuclear antiferromagnetically coupled complex (n-Bu4N)2[(dmit)Cu11(tto)CuI,(dmit)] (dmit = dimercaptoisotrithion, tto = tetrathiooxalate) identify the mononuclear S = '/ 2 complex [Cun(dmit)2l2~ as being responsible for the observed EPR spectra. The 63Cu hyperfine structure data as well as the data obtained from density functional theory (DFT) and extended Hückel theory molecular orbital (EHT-MO) calculations were used to characterize the spin-density distribution of the copper complex. 
  Reference    Z. Naturforsch. 54b, 832—838 (1999); eingegangen am 16. April 1999 
  Published    1999 
  Keywords    Copper(II) Complexes, Single-Crystal EPR, DFT-MO Calculations 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0832.pdf 
 Identifier    ZNB-1999-54b-0832 
 Volume    54 
6Author    Luigi Sportelli, H. Arald Neubacher, Wolfgang LohmannRequires cookie*
 Title    N O T I Z E N On the Influence of Arom atic R esidues on the Interaction of Copper (II) w ith Small P eptides Containing Arom atic Am ino Acids: ESR and Optical Studies  
 Abstract    The complexation behaviour of C u(II) with di-and tri­ peptides containing the aromatic amino acids phenylalanine or tryptophan has been investigated at different pH-values and compared with results obtained with di-and triglycine. The results obtained by means of ESR and optical absorp­ tion spectroscopy show an influence of the two different aromatic entities on the magnetic and optical param eters. A significant decrease of the < 7||-value and, concom ittantly, an increase of the energy of the d-d transition was m easured when an aromatic entity is present in the peptide. A possible explanation for this observation is given. 
  Reference    (Z. Naturforsch. 32c, 643 [1977]; received May 4 1977) 
  Published    1977 
  Keywords    Copper (II)-Complexes, Peptides, Aromatic Amino Acids, Optical Absorption 
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 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0643_n.pdf 
 Identifier    ZNC-1977-32c-0643_n 
 Volume    32 
7Author    J.Requires cookie*
 Title    Electronic Structure of Pseudotetrahedral Copper(II) Schiff Base Complexes  
 Abstract    W a s s o n , H . W a y n e R i c h a r d s o n , a n d W i l l i a m E . H a t f i e l d Copper(II) complexes with the Schiff bases formed by condensing i-butyl-, isopropyl-, cyclohexyl-and diphenylmethylamines with salicylaldehyde and 3-methoxy-and 5-nitro-salicyl -aldehyde have been prepared and characterized. The isotropic nuclear hyperfine coup -ling constants increase in the order t-butyl < isopropyl < cyclohexyl < diphenylmethyl for the N-substituents in the three series of complexes while isotropic g-values increased in the opposite direction. Spectra structure correlations were examined and discussed. 
  Reference    (Z. Naturforsch. 32b, 551—561 [1977]; received December 2 1976/February 12 1977) 
  Published    1977 
  Keywords    Copper(II) Complexes, Electron Paramagnetic Resonance, Schiff Base Complexes, Electronic Spectroscopy, Hyperfine Coupling Constants 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-0551.pdf 
 Identifier    ZNB-1977-32b-0551 
 Volume    32 
8Author    Horst Elias, Elke Hilms, Helmut PaulusRequires cookie*
 Title    X-Ray Structures and Spectral Properties of 4-Coordinate Copper(II) and Palladium(II) Complexes with a Tridentate ONN-Schiff Base Ligand  
 Abstract    The tridentate mono-basic Schiff base N-(2-diethylaminoethyl)salicylaldimine =Hsal-en-NEt2 forms complexes 1 = [(sal-en-NEt2)MY] with divalent metals M (Y = halide). The preparation of three copper(II) complexes la (Y = Br), lb (Y = Cl), and lc (Y = SCN) and one palladium(II) complex 1(1 (Y = Cl) is described and the UV/VIS spectra of these complexes in methanol and chloroform are compared and discussed. The crystals of la • CHCI3, lb • CHCI3, and Id • CHCI3 are all isotypic and crystallize in the ortho-rhombic space group Pbca, whereas the solvent-free crystals of 1 b (and also 1 a) are monoclinic with the space group P2i/c. The metal is 4-coordinate with an almost planar ONNY donor atom arrangement around the palladium and with a distorted arrangement around the copper. The crystals consist of separate non-bridged complex units and the chloroform is not coordinated. 
  Reference    Z. Naturforsch. 37b, 1266—1273 (1982); received March 31 1982 
  Published    1982 
  Keywords    X-ray, UV/VIS Spectra, Tridentate ONN Schiff Base, Copper(II) Complexes, Palladium(II) Complexes 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1266.pdf 
 Identifier    ZNB-1982-37b-1266 
 Volume    37