HYDROGEN-BOND INDUCED SYNTHESIS, CHARACTERIZATION, AND CRYSTAL STRUCTURES OF END-TO-END AZIDO-BRIDGED POLYMERIC COPPER(II) COMPLEXES DERIVED FROM TRIDENTATE SCHIFF BASES

• Published in: Journal of the Chilean Chemical Society 2013, Vol.58 (2), p.1775-1778
• Main Authors: SHAO-SONG, QIAN, XIAO-SHAN, CHENG, ZHONG-LU, YOU, HAI-LIANG, ZHU
• Format: Article
• Language: English
• Subjects: CHEMISTRY, MULTIDISCIPLINARY
• ISSN: 0717-9707; 0717-9707
• DOI: 10.4067/S0717-97072013000200030

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.