Institut Agronomique, Universit6 de Louvain, H~verl6-Louvain (Belgium) ABSTRACT MO~TTMOm~LLONrrE may adsorb cobalt(III)hexammine and cobalt(III)chloropentammine cations, and the C.E.C. determined for these complex cations is of the order of magnitude of that obtained with ammonium. The infrared spectra of these coordination complexes adsorbed by the clay are similar to those observed for the co...

The use of 2-pyridinealdoxime (paoH)/N,N'-donor ligand (L-L) "blend" in cobalt chemistry has afforded two cationic mononuclear cobalt(III) complexes of the general type [Co(pao)(2)(L-L)](+), where L-L = 1,10-phenanthroline (phen) and 2,2'-bipyridine (bpy). The CoCl(2)/paoH/L-L (1 : 2 : 1) reaction system in MeOH gives complexes [Co(III)(pao)(2)(phen)]Cl.2H(2)O (1.2H(2)O) and [Co(III)(pao)(2)(bp...

Nicotinium dichromate (NDC) oxidation of pentaamminecobalt (III) complexes of ∝ hydroxy acids in micellar medium yielding nearly 100% of keto acid complex is ultimate product. The decrease in UV-Visible absorbance at 502 nm for Co(III) complex corresponds to nearly 0% reduction of the initial absorbance. The stoichiometry of unbound ligand and cobalt(III) complex is accounting for no reduction ...

Enantiomerically enriched coordination compounds of aspartic acid and racemic mixtures of coordination compounds of glycine metal-ligand ratio 1 : 3 were synthesized and characterized using infrared and UV-Vis spectrophotometric techniques and magnetic susceptibility measurements. Five of the complexes were resolved using (+)-cis-dichlorobis(ethylenediamine)cobalt(III) chloride, (+)-bis(glycina...

The evolution and the current trends in a new area of chemistry of organometalloporphyrins, in metalloporphyrin chemistry are reviewed. Synthesis and properties of out of plane, di—nuclear, and "Skewered" metalloporphyrins are described. The new chemistry of metalloporphyrins was initiated by the application of Cr(CO)6, metal carbonyl in general, for insertion of Cr ion (metal ions) into por— p...