Hydroxycarboxylato Complexes of Copper(II): Synthesis and Characterization

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Abstract
Substitution reactions of anhydrous copper(II) acetate with some higher carboxylic acids and hydroxycarboxylic acids were carried out in toluene under reflux. The isolated products; Cu(OOCR)(OOCR′), Cu(OOCR)(OOCR″) and Cu(OOCR)(OOCR″′) [where R = C13H27, C17H35 or C21H43 and R′ = C6H4OH, R″ = C6H5CH(OH) and R″′ = (C6H5)2C(OH)] were characterized by elemental analyses, spectral (infrared and electronic) analyses and conductivity measurements. IR spectra suggest the presence of bidentate-bridging coordination of carboxylate anions in the complexes. Magnetic moment measurement and electron spin resonance spectral data suggest antiferromagnetic coupling between two copper atoms. The dinuclear nature of the complexes was confirmed by molecular weight determinations.