Abstract
The reaction of Rh 6(CO) 16 at 25°C with a phosphinated silica surface, LSiO 2, gives rise to the formation of zerovalent particles linked to the support, which have probably kept the Rh 6 cluster frame. Their carbonylation leads to the formation of Rh 6(CO) 16 − x (LSiO 2) x where x seems to be equal to 3 and from which the carbonyl ligands are not easily dissociated. Interaction at 80 °C of Rh 6(CO) 16 with the phosphinated silica support leads to the formation of a mixture of Rh(0) and Rh(I) species, which are interconvertible by oxidation or reduction, respectively, under mild conditions. The carbonyl species obtained show a much higher thermal stability than those obtained under similar conditions on pure silica surface.
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