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1Author    KonstantinV. Domasevitch3, VeraV. Ponomarevaa, AndreyA. Mokhir3, EduardB. Rusanov3, Joachim Sielerb, Eberhard HoyerbRequires cookie*
 Title    The Phenomenon of Intramolecular Attractive S— O Interactions: Synthesis and Structure of (l,10-Phenanthroline)copper(II) Complexes with Isonitroso-(4-methylthiazol-2-yl)acetamide and Isonitroso-(4-methylthiazol-2-yl)-(benzothiazoI-2-yl)methanide  
 Abstract    Isonitroso-(4-methylthiazol-2-yl)acetamide H (L '), isonitroso-(4-methylthiazol-2-yl)(benzo-thiazol-2-yl)methanide H(L2) and their copper(II) complexes of composition [C u(Phen){L'}(C 104)] (1) and [Cu(Phen){L2}Cl]*C2H5 0 H (2) have been prepared. Crys­ tal and molecular structures of the complexes have been determined from X-ray diffractioon data (1: monoclinic, space group P2]/c, with a = 11.611(2), b = 10.259(2), c = 17.869(4) Ä, ß = 104.67(3)°, V = 2059.1(7) Ä3, Z = 4; R\ = 0.046 for the 2522 unique reflections with I > 2a(I). 2: triclinic, space group PI, with a = 8.351(1), b = 10.876(1), c = 14.891(2) Ä, a = 96.170(8)°, ß = 94.201(9)°, 7 = 106.721(9)°, V = 1280.1(2) A3, Z = 2; R\ = 0.034 for the 4038 unique reflections with I > 2a(I)). In the structure of 1 the coordination polyhedron of Cu2+ is a distorted square pyramid with an oxygen atom of the CIO4 counter anion in the apex (C u -0 2.505(3) A); in complex 2 the copper atom adopts fivefold coordination of a slightly distorted trigonal-bipyramidal geometry with a chlorine atom in the equatorial plane (Cu-Cl 2.3504(9) A). Ethanol of crystallization gives rise to a hydrogen bond at the chlorine atom. In both structures the oximic anions are coordinated to the metal center in a bidentate chelate manner via the nitrogen atom of the nitroso group and the carbonyl oxygen atom (1) or via the benzothiazole nitrogen atom (2) (Cu-O, Cu-N in the range 1.963(2) -2.031 (2) Ä). The thiazole group of the ligands takes no part in the coordination. The nitroso oxygen atoms possess short intramolecular contacts with thiazole sulphur atoms, with d(S— O) at 2.605(3) (1) and 2.676(3) A (2), which may be attributed to a strong intraligand interaction. 
  Reference    Z. Naturforsch. 52b, 323—330 (1997); received September 16 1996 
  Published    1997 
  Keywords    Copper(II), Oximes, Thiazoles, Benzothiazoles, X-Ray 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0323.pdf 
 Identifier    ZNB-1997-52b-0323 
 Volume    52