A Study on Spontaneous Resolution of Cobalt(III) Complex Salts

Abstract

Abstract Solubility of the racemic and optically active isomers of [Co(ox)en2]X, [CoCO3en2]X, cis-[Co(NO2)2en2]X and M[Co(edta)] in water was determined at 5–60 °C (X=Cl, Br, and I; M=NH4 and K). The correlation between solubility of the spontaneously resolved racemic complex and of the corresponding optically active isomer is discussed. Spontaneous resolutions were observed for [Co(ox)en2]X (X=Cl, Cl·H2O, and Br·H2O), cis-[Co(NO2)2-en2]X (X=Cl and Br) and M[Co(edta)]·2H2O (M=NH4 and K).