Cobalt tetracarbonyl hydride and styrene react in the presence of carbon monoxide to form ethylbenzene and (α-phenylpropionyl)cobalt tetracarbonyl; both reactions are first order in HCo(CO)4 and PhCH=CH2 and independent of CO and Co2(CO)8 concentration. The kinetic data suggest a common radical pair intermediate for both reactions. (α-Phenylpropionyl)cobalt tetracarbonyl is not the final product of the reaction: it slowly decomposes into ethylbenzene, CO, and Co2(CO)8 and partly isomerizes into (β-phenylpropionyl)cobalt tetracarbonyl. Accordingly, among these acyl complexes the branched-chain isomer is the kineticly controlled product and the straight-chain isomer the thermodynamicly controlled product.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry