Journal
ORGANOMETALLICS
Volume 24, Issue 15, Pages 3634-3643Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om0500422
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The HCo(CO)(3)-catalyzed hydroformylation of butadiene has been investigated at the B3LYP density functional level of theory. It is found that butadiene hydroformylation favors the formal 1,4-addition product in high regioselectivity. The enhanced stability of the syn-eta(3)- allyl complex ((eta(3)-CH2CHCH(CH3))Co(CO)(3)) presents a distinctly thermodynamic preference for the Markovnikov insertion, and the following CO addition favors forming the 1,4-addition intermediate over the branched intermediate both kinetically and thermodynamically. Neither linear nor branched 1,2-addition product is favored. These results agree perfectly with the experimental findings. Furthermore, it is shown that methanol as solvent does not change the mechanistic picture significantly.
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