Synthesis, crystal structure, and antimicrobial activity of silver(I) complexes derived from 3-nitrobenzoic acid and diamines

Abstract

Two new silver(I) complexes, [Ag₂(NBA)₂(DAC)] (I) and [Ag₂(NBA)₂(DAB)] (II), where NBA, DAC, and DAB are 3-nitrobenzoate, 1,2-diaminocyclohexane, and 1,4-diaminobutane, respectively, are prepared and characterized by elemental analysis, IR spectroscopy, and single-crystal X-ray diffraction (CCDC nos. 1487698 (I), 1487699 (II)). The Ag(1) atom in I is in a linear coordination mode built by two N atoms from two DAC ligands. The Ag(2) atom in I is in a distorted triangular coordination mode formed by three O atoms from two NBA ligands. The Ag(1) atom in II is in a linear coordination mode formed by one O atom of a NBA ligand and one N atom of a DAB ligand. Crystal structures of both complexes are stabilized by hydrogen bonds and weak π···π interactions. The effect of the complexes on the antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans is studied.