Syntheses, Crystal Structures, and Antibacterial Activities of the Cu(II) Complex {Cu2[5-(NO_2)sal]2 (DMF)4}2 and Co(II) Complex{Co[5-(NO_2)sal] (H_2O)_3}2

摘要

Two novel complexes, {Cu2[5-(NO_2)sal]2 (DMF)4}2 (1) and {Co[5-(NO_2)sal] (H_2O)_3}2 (2), have been prepared and characterized by elemental analysis, IR spectrum, and X-ray single-crystal diffraction. Complex 1 is a four nuclear Cu(II) complex and belongs tomonoclinic system with space group C 2/c, a=23.541(2) ?, b=14.8150(12) ?, c=22.459(2) ?, β =104.361(2)?, V =7588.0(12) ?~3, D_c = 1.368 Mg/m~3, Z = 4, F(000) = 3216, R1 = 0.0826, wR_2 = 0.2212 [I>2σ(I)] Every Cu(II) atom is six-coordinated by three O atoms from two 5-(NO_2)sal and two O atoms from two DMF and one bridged O atom. The distance of Cu···Cu are 4.5027(14), 5.817(2), and 5.526(2) ?. Complex 2 is a dinuclear Co(II) complex and belongs to monoclinic system with space group P 21/c, a = 10.9003(9) ?, b = 13.6938(15) ?, c = 6.6781(5) ?, β = 91.223(1)?, V = 996.59(16) ?~3, Dc = 1.748 Mg/m~3, Z = 2, F(000) = 596, R1 = 0.1058, wR_2 = 0.3098 [I>2σ(I)] Every Co(II) atom is sixcoordinated by two O atoms from one 5-(NO_2)sal and three O atoms from three coordinated water and one bridged O atom, and the distance of Co···Co is 3.191(3) ?. Two complexes have been screened for antibacterial activities by the agar-diffusion method and showed good effects against Escherichia coli, Staphylococcus aureus, and Bacillus subtilis. (5-(NO_2)sal = 5-nitrosalicylate anion, DMF = N, N-dimethylformamide).