Abstract

The cyanobenzoates of Cu(II) have been prepared and their magnetic and spectral properties examined. Although Cu(II) compounds of ortho-substituted benzoic acids crystalline from aqueous solutions mostly as monohydrates with dimeric structure, Cu(II) o-cyanobenzoate precipitated out as a dihydrate with the magnetic and spectral properties of a monomer whilst its anhydrous form has the characteristics of a dimer. Anhydrous Cu(II) m-cyanobenzoate behaves as a dimer and was isolated from the same solution along with the monohydrate which consists of a mixture of dimer and or polymer. Dihydrated Cu(II) p-cyanobenzoate and the basic salt, Cu( p-CNC 6H 4COO) (OH), comprise monomeric or polymeric molecules.

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