Abstract
The potential of several alkylcobalt complexes as catalysts for hydrogenation and isomerization of alkenes has been investigated. The complexes CH 3Co(CO) 2(Pom-Pom) (Pom-Pom = 1,2 bis(dimethoxyphosphino)ethane), CH 3Co(CO) 3P(OMe) 3 and C 6H 5CH 2Co(CO) 3PPh 3 are compared to CH 3Co(CO) 2(P(OMe) 3) 2, for their ability to function in catalytic cycles. Each is active for hydrogenation and isomerization of alkenes under conditions where the carbonylation-decarbonylation equilibrium is readily established. The lifetime for the complexes is much shorter than for CH 3Co(CO) 2 (P(OMe) 3) 2 suggesting that two phosphorus donors in trans positions in an intermediate is a requirement for catalyst stability in these alkylcobalt complexes.
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