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Two new end-to-end azido-bridged polymeric copper(II) complexes, [CuL 1 (μ 1,3 -N 3 )] n (1) and [CuL 2 (μ 1,3 -N 3 )] n (2), where L 1 and L 2 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 P 2 1 2 1 2 1 , with unit cell dimensions a = 7.6651(9) A, b = 8.3213(9) A, c = 20.149(2) A, V = 1285.2(2) A 3 , Z = 4, R 1 = 0.0296, and wR 2 = 0.0697. Complex (2) crystallizes in the orthorhombic space group Pbca , with unit cell dimensions a = 10.353(1) A, b = 13.069(2) A, c = 22.265(2) A, V = 3012.6(7) A 3 , Z = 8, R 1 = 0.0400, and wR 2 = 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) A in (1) and 5.277(2) A in (2). Hydrogen bonds can influence the bridging mode of the azide ligand.

journal of the chilean chemical society

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