Hydrogen-bond induced synthesis, characterization, and crystal structures of end-to-end azido-bridged polymeric copper(ii) complexes derived from tridentate schiff bases

• QIAN SHAO-SONG ^[1] ; CHENG XIAO-SHAN ^[2] ; YOU ZHONG-LU ^[2] ; ZHU HAI-LIANG ^[1]
  1. [1] Shandong University of Technology

     Shandong University of Technology

     China

     
  2. [2] Liaoning Normal University

     Liaoning Normal University

     China

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 58, Nº. 2, 2013, págs. 1775-1778
• Idioma: inglés
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• Resumen

  • Two new end-to-end azido-bridged polymeric copper(II) complexes, [CuL¹(µ13-N3)Jn (1) and [CuL²(µ13-N3)Jn (2), where L¹ and L² are the monoanionic form of 5-methoxy-2-[(2-methylaminoethylimino)methyl]phenol and 4-chloro-2-[(3-dimethylaminopropylimino)methyl]phenol, have been prepared and structurally characterized by elemental analysis, IR spectra, and single crystal X-ray determination. Complex (1) crystallizes in the orthorhombic space group P2(1)2(1)2(1), with unit cell dimensions a = 7.6651(9) Å, b = 8.3213(9) Å, c = 20.149(2) Å, V = 1285.2(2) A³, Z = 4, R1 = 0.0296, and w׳R2 = 0.0697. Complex (2) crystallizes in the orthorhombic space group Pbca, with unit cell dimensions a = 10.353(1) Å, b = 13.069(2) Å, c = 22.265(2) Å, V = 3012.6(7) A³, Z = 8, R1 = 0.0400, and w׳R2 = 0.1014. Each Cu atom in the complexes is in a square pyramidal coordination, with three donor atoms of the Schiff base ligand and one azido N atom defining the basal plane, and with another azido N atom occupying the apical position. The Cu-Cu distances are 5.173(2) Å in (1) and 5.277(2) Å in (2). Hydrogen bonds can influence the bridging mode of the azide ligand.