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Molecular Beam Study of the KrF* Laser Photodissociation of Cr(CO)6 and Mo(CO)6

  • George W. Tyndall (a1) and Robert L. Jackson (a1)

Abstract

The one-photon and sequential two-photon KrF* laser (248 nm) photodissociation of Cr(CO)6 and Mo(CO)6 were studied in a molecular beam using mass spectrometry to detect the photoproduct molecular ions. For Cr(CO)6, the major one-photon product, Cr(CO)4, undergoes secondary photodissociation to give predominantly Cr(CO)2. The photodissociation cross section of Cr(CO)4 is found to be 1.6 × higher than that of Cr(CO)6 at 248 nm. For Mo(CO)6, the major one-photon products, Mo(CO)5 and Mo(CO)4, undergo secondary photodissociation to give predominantly Mo(CO)3.

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1. See Tyndall, G. W. and Jackson, R. L., J. Am. Chem. Soc., 109, 582 (1987) and references cited therein.
2. See Bauerle, D., Chemical Processing with Lasers, Vol.1, Springer Ser. Mater. Sci., Springer-Verlag, New York (1986).
3. See Gedanken, A., Robin, M. B., and Kuebler, N. A., J. Phys. Chem., 86, 4096 (1982).
4. Gerrity, D. P., Rothberg, L..J., and Vaida, V., J. Phys. Chem., 87, 2222 (1983).
5. Tyndall, G. W. and Jackson, R. L., J. Chem. Phys., 89, 1364 (1988).
6. See Weitz, E.,. J. Phys. Chem., 91, 3945 (1987) and references cited therein.
7. Tyndall, G. W. and Jackson, R. L., to be published.
8. Ishikawa, Y., Hackett, P. A., and Rayner, D. M., J. Phys. Chem., 92, 3863 (1988).
9. Lewis, K. E., Golden, D.M., and Smith, G. P., J. Am. Chem. Soc., 106, 3905 (1984).

Molecular Beam Study of the KrF* Laser Photodissociation of Cr(CO)6 and Mo(CO)6

  • George W. Tyndall (a1) and Robert L. Jackson (a1)

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