Hydroformylation and related reactions of vinylsilanes catalyzed by siloxide complexes of rhodium(I) and iridium(I)

Rhodium(I) and iridium(I) siloxide complexes used as catalysts of hydroformylation of the vinylsilanes at 80 °C and 10 atm of H2/CO (H2:CO = 1) produced aldehydes (n + iso) as the main products with yields of up to 100%. In the presence of the iridium complexes some amounts of ethylsilanes, up to 40%, were obtained, besides aldehydes, as a result of hydrogenation of the substrates. In the presence of the rhodium complexes, isomerization of iso-aldehydes to 1-siloxypropenes was observed under the reaction conditions. Under 10 atm of H2, the rhodium complexes appeared to be also very effective catalysts of vinylsilanes hydrogenation.