| Abstract: A ternary complex of Cu(pfpa)2(aben)2(pfpa=para-formyl phenoxyacetic acid anion, aben=2-amino ben-zothiazole) was synthesized by the reaction of copper acetate, 2-amino benzothiazole and para-formyl phenoxya-cetic acid. Elemental analysis, IR spectra and X-ray single-crystal diffraction were carried out to determine the composition and crystal structure. The complex crystallizes in the monoclinic system, space group P21/c with a=1.319 7(5) nm, b=0.738 8(4) nm, c=1.743 3(9) nm, β=110.42(4)°, C32H26CuN4O8S2, Mr=722.23, V=1.592 7(13) nm3, Z=2, Dc=1.506 Mg·m-3, μ=0.875 mm-1, F(000)=742, the final R=0.067 7, wR=0.143 0 for 1 842 observed reflec-tions [I>2σ(I)]. The central copper atom is four-coordinated with two carboxylate oxygen atoms of the two pfpa ligands and two nitrogen atoms in thiazole rings of the two aben ligands. The crystal structure shows that there are intermolecular and intramolecular hydrogen bonding between amino-nitrogen atoms of the two aben ligands and carboxylate oxygen atoms of the two pfpa ligands. The antimicrobial properties of the complex and its two ligands were tested against representative bacterial and fungal strains. The copper complex exhibited an excellent antifungal activity, better than that of its two free ligands, but for bacteria, its inhibitory effect is less than that of 2-amino benzothiazole. CCDC: 739398. |
