Hydroxycarboxylato complexes of copper(II): Synthesis and characterization

Substitution reactions of anhydrous copper(II) acetate with some higher car boxylic acids and hydroxycarboxylic acids were carried out in toluene under reflux. The isolated products; Cu(OOCR)(OOCR'), Cu(OOCR)(OOOCR ") and Cu(O OCR)(OOCR''') [where R = C13H27, C17H35 or C21H43 and R' = C6H4OH, R " = C6 H5CH(OH) and R''' = (C6H5)(2)C(OH)] were characterized by elemental analyse s, spectral (infrared and electronic) analyses and conductivity measurement s. IR spectra suggest the presence of bidentate-bridging coordination of ca rboxylate anions in the complexes. Magnetic moment measurement and electron spin resonance spectral data suggest antiferromagnetic coupling between tw o copper atoms. The dinuclear nature of the complexes was confirmed by mole cular weight determinations.