Four out of six theoretically possible isomers of the (1,3-diaminopropane)b
is(S-tyrosinato)cobalt(III) complex, having the cis(O) configuration, were
isolated, and the trans(O) isomer was only defined in the eluate. The isome
rs were separated on an optically active Sephadex QAE column. Geometrical a
nd absolute configurations of the isomers were determined by electronic abs
orption, circular dichroic and H-1 NMR spectra. The effect of the aromatic
side group of the coordinated S-tyrosinato ligand on the stereoselective fo
rmation of the obtained isomers was examined.