Abstract
Unsymmetrical β-diketonate metal (III) chelates, tris (formylacetonato) cobalt (III) and-chromium (III) chelates, were synthesized. Fac and mer isomers of these chelates were separated by column chromatography, and the stereochemistry of paramagnetic cobalt (III) chelate is discussed from nuclear magnetic resonance (NMR) spectra. Electrophilic substitution reactions (chlorination, bromination, iodination, nitration, and thiocyanation) of the fac and mer isomers of these chelates were successful. Infrared, ultraviolet, and NMR spectra were measured for these chelates.
