Photoreaction of Hexacarbonylmolybdenum(O) and Tricarbonyl(eta(5)-cyclopentadienyl)hydridomolybdenum(II) in the Presence of Cyclopentadiene: Substitution, Oxidative Addition, and Hydrometallation.
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY
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Irradiation of MoCO6 in the presence of C5H6 yields Eta5-C5H5Eta3-C5H7-MoCO2 via a sequence of light-induced reactions involving substitution, MoCOnC5H6 n 5,4 oxidative addition, Eta5-C5H5MoCO3H and hydrometallation, Eta5-C5H5Eta3-C5H7MoCO2. The sequence of events can be followed by monitoring the infrared spectral changes in the CO stretching region. An authentic sample of Eta5-C5H5MoCO3H cleanly yields Eta5-C5H5Eta3-C5H7MoCO2 when irradiated in the presence of C5H6 the 355 nm quantum yield for this reaction is 0.12 or - 0.02. Photoinduced hydrometallation of C5CH35H, trans-trans-2,4-hexadiene, 1,4-pentadiene, trans-1,3-pentadiene also appears to obtain upon irradiation of Eta5-C5H5MoCO3H in the presence of the diene. Irradiation of CrCO6 in the presence of C5H6 yields CrCO2Eta5-C5H5Eta3-C5H7. Author
- Organic Chemistry