Abstract
Abstract The oxo reaction of ethyl acrylate by rhodium carbonyl has been studied and compared with that by cobalt carbonyl. The reaction conditions (the temperatures, and the partial pressures of carbon monoxide and hydrogen) affect the distribution of the products (α- and β-carbethoxy-propionaldehyde) more remarkably, but in a way similar to that in the reaction by cobalt carbonyl: the proportion of β-carbethoxypropionaldehyde increases greatly with an increase in the reaction temperature, but decreases with an increase in the partial pressure of carbon monoxide or hydrogen. Judging from this similarity, it is probable that rhodium carbonyl reacts with ethyl acrylate as rhodium hydrocarbonyl to give alkyl- and acylrhodium carbonyls in the course of the reaction.
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