Synthesis, Characterization, and Antibacterial Activity of Cd(II) Complexes with 3-/4-Fluorobenzoates and 3-Hydroxypiridine as Co-Ligands

Abstract

In this study, two new complexes of Cd(II) 4-fluorobenzoate (4-FB)/3-fluorobenzoate (3-FB) with 3-hydroxypyridine (3-HPY) have been synthesized and structural characterizations have been performed by using elemental analysis, FT-IR spectroscopy, and single-crystal X-ray diffraction methods. In both complexes, the metal atom is chelated by two carboxylate groups from two 4- or 3-fluorobenzoate anions and coordinated by two 3-hydroxypyridine (HPY) molecules. In both complexes, an oxygen atom of carboxylate from the adjacent anion bridges to the Cd atom, completing the distorted seven-coordination geometry. The only difference between complexes is the positions of fluorine atoms in fluorobenzoic acids (4-fluorobenzoic acid (complex 1) and 3-fluorobenzoic acid (complex 2)). Antibacterial resistance of two new complexes to some bacteria has been investigated.