COLUMN CHROMATOGRAPHY STUDIES ON THE ACID-HYDROLYSIS PRODUCTS OF SOME SOLID TRIS(PYRIDINE)COBALT(III) COMPLEXES

Cold column chromatography of partially hydrolyzed solutions of solid tris(pyridine)cobalt(III) salts dissolved in perchloric acid media have resulted in the isolation of an acetatocomplex, a chlorobridged complex involving mercury(II) and an unsymmetric dimeric complex. These complexes have been characterized in solution by the determination of their visible spectra and pyridine:cobalt(III) ratios. The pKavalues have been determined for the bridged complex (3.39) as well as those for [Co(py)2(CO3)(H2O)2]+(2.48), [Co(py)3(CO3)(H2O)]+(2.41) and [Co(py)3Cl(H2O)2]2 +(2.38). © 1991, Taylor & Francis Group, LLC. All rights reserved.