Substitutions of copper(II) carboxylates with Schiff bases

Substitutions of anhydrous copper(II) acetate with higher carboxylic acids in an equimolar ratio in refluxing toluene yield monosubstituted soluble derivatives, which undergo substitutions with Schiff bases (derived from salicylaldehyde and aniline or p-chloroaniline) to give mixed complexes of the general formula [Cu(OOCR)- (SB)] (HSB = Schiff base and R = C13H27, C15H31, C17H35 and C21H43). The products have been characterized by elemental analyses, electrical conductance, magnetic moment and spectral (i.r. and electronic) data. Cryoscopic molecular weight determinations indicate that the derivatives are dimers. The complexes are e.p.r. silent.