UV-spectroscopic studies on the interaction of triethyl aluminium with cobalt and aluminium acetylacetonates

The Al(acac)3/Et2Al(acac) ratio depends on the Al/Co and the solvent. The solvent contains Et2Al(acac) as a dimer, which is stabilized in the presence of Co(O) and arenes. The role of Et2Al(acac) dimer in the formation of active Co(O) complexes is discussed.