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'Mixed Ligand Complexes' in keywords Facet   Publication Year 1995  [X]
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1995[X]
1Author    Hide Kambayashia, Junko Yuzurihara3, Yuichi Masuda3, Hiroko Nakagawab, Wolfgang Linertc, Yutaka FukudaadRequires cookie*
 Title    4-and 5-Coordinate Dinuclear Copper(II) Complexes with the Tetraacetylethanediide and an N-Alkylated Diamine or a Triamine  
 Abstract    Six dinuclear copper(II) complexes have been prepared, Cu2(taet)(plam)2X 2 where taet = 1,1,2,2-tetraacetylethanediide, plam = N-alkylated polyamine such as tmen = N,N,N',N'-tetra-methylethylenediamine or pmdt = N,N,N',N",N"-pentamethyldiethylenetriamine, X = a monovalent anion such as C104-, N 0 3-or C L. These complexes are classified into two categories from the results of electronic spectra, IR spectra, and X-ray single crystal structure analysis as follows: (1) 4-coordinate-4-coordinate dinuclear, [Cu2(taet)(tmen)2]X 2 (where X = C104~ or N 0 3-), (2) 5-coordinate-5-coordinate dinuclear, [Cu2(taet)(tmen)2Cl2], and [Cu2(taet)(pmdt)2]X 2 (where X = C104~, N 0 3-, or Cl-). The crystal structure of Cu2(taet)(tmen)2(C104)2-H20 (1) has been determined by the single crystal X-ray diffraction technique; monoclinic space group P2Ja with a = 26.478(3), b = 8.744(1), c = 15.601(3) Ä, ß = 106.195(9)°, and V = 3468.9(8) Ä 3 for Z = 4. The final agreement factors are R = 0.097 (Rw = 0.099). The geometry of each Cu(II) moiety in the dinuclear cation (1) is 4-coordinate square planar with a N 20 2 donor set. This tmen-dinuclear complex exhibits a very weak C u (II)-C u (II) interaction (J = -0.5 cm-1), and shows characteristic ESR spectra with seven hyperfine peaks in 1,2-dichloroethane solution at room temperature. This is not found for the corresponding pmdt-dinuclear complex. All complexes obtained in this study are very soluble in many organic solvents. The tmen-dinuclear complexes show pronounced solvato-chromic behavior-dependent on the solvent donor properties. This is not found for the corre­ sponding pmdt-dinuclears, which are stable as 5-coordinated species. 
  Reference    Z. Naturforsch. 50b, 536—544 (1995); received October 12 1994 
  Published    1995 
  Keywords    Dinuclear Cu(II) Complexes, 5-Coordinate Complexes, Chromotropism, Mixed Ligand Complexes, Anion Coordination 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0536.pdf 
 Identifier    ZNB-1995-50b-0536 
 Volume    50