| Abstract: A pair of structurally similar dinuclear copper(Ⅱ) complexes, [CuL1]2 (1) and [CuL2]2 (2), where L1 is the dianionic form of the bis-Schiff base N,N'-bis(5-fluorosalicylidene)-1,3-propanediamine (H2L1), and L2 is the dianionic form of N,N'-bis(5-fluorosalicylidene)-1,2-ethanediamine (H2L2), have been synthesized and characterized by elemental analysis, infrared spectra and single-crystal X-ray diffraction. Complex 1 crystallizes as the monoclinic space group P21/c, with unit cell dimensions a=1.348 8(1) nm, b=0.681 4(1) nm, c=1.708 7(1) nm, β=108.903(3)°, V=1.485 7(2) nm3, Z=4, R1=0.048 0, wR2=0.114 1, Goof=1.115. Complex 2 crystallizes as the monoclinic space group C2/c, with unit cell dimensions a=2.756 8(2) nm, b=0.703 6(1) nm, c=1.454 7(1) nm, β=94.758(2)°, V=2.811 8(5) nm3, Z=4, R1=0.047 2, wR2=0.113 9, Goof=1.094. X-ray analysis indicates that the complexes are centrosymmetric dinuclear species, with the Cu atoms in square pyramidal coordination. The complexes were evaluated for their antibacterial (Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Pseudomonas fluorescence) and antifungal (Candida albicans and Aspergillus niger) activities by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) method. CCDC: 940737, 1; and 972404, 2. |
