Formation of a Polymer-Supported Catalyst from Anchored RhOs3 Clusters: Aggregation with Segregation of the Metals

Article abstract of DOI:10.1021/j100252a021

Supported molecular metal clusters were prepared by the ligand association reaction involving the phosphine groups of poly(styrene-co-divinylbenzene-co-p-styryldiphenylphosphine) and to give >.This molecular analogue was used as a precursor of a supported metal catalyst, its activity being probed with the isomerization of but-1-ene and the hydrogenation of ethylene, and its structure being characterized by infrared spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy.The results show that the initial bimetallic cluster broke up with segregation of the metals.The infrared spectra show that the cluster breakup gave stable triosmium carbonyl clusters, which account for the isomerization activity.The activity for hydrogenation is attributed to Rh metal; the elctron microscopy suggested the presence of metal particles <1.0 nm in diameter.