Volume 75, 1983

Unimolecular reactions induced by vibrational overtone excitation

Abstract

A continuous-wave dye laser has been used to activate molecules above threshold for unimolecular reaction. Visible photons selectivity excite high overtone transitions of inequivalent CH oscillators. Thus, a known amount of energy is deposited directly into vibrational degrees of freedom of the molecule in its electronic ground state in a single photon absorption. The rate of unimolecular reaction has been measured as a function of internal energy, type of CH overtone transition excited and pressure to test for non-statistical effects. Results are presented for the isomerization of cyclobutene and 1-cyclopropylcyclobutene to the corresponding buta-1,3-dienes and the isomerization of 2-methylcyclopentadiene to 1-methylcyclopentadiene. No evidence for significant deviations from statistical behaviour has been observed.

Article information

Article type
Paper

Faraday Discuss. Chem. Soc., 1983,75, 289-299

Unimolecular reactions induced by vibrational overtone excitation

J. M. Jasinski, J. K. Frisoli and C. B. Moore, Faraday Discuss. Chem. Soc., 1983, 75, 289 DOI: 10.1039/DC9837500289

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