Site-specific bimolecular chemistry: the reactivity of Cl atoms and butanes

Kenneth A. Cowen; Yu-Fong Yen; K. Thomas Lorenz; Brent D. Koplitz

doi:10.1117/12.220838

18 September 1995 Site-specific bimolecular chemistry: the reactivity of Cl atoms and butanes

Kenneth A. Cowen, Yu-Fong Yen, K. Thomas Lorenz, Brent D. Koplitz

Proceedings Volume 2548, Laser Techniques for State-Selected and State-to-State Chemistry III; (1995) https://doi.org/10.1117/12.220838
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The reaction of chlorine atoms with selectively-deuterated butanes to form HCl and/or DCl under single-collision conditions has been studied. Photolysis of Cl₂ with 351 or 308 nm light produces Cl atoms that subsequently abstract an H or D atom to form the corresponding hydrogen chloride product. HCl and DCl are detected via 2 plus 1 multiphoton ionization. For both n-butane and isobutane when viewed on a per hydrogen atom basis, the 'middle' site is preferred. When viewed on a per carbon site basis, this propensity is still observed in n- butane, but isobutane shows no dominant site specificity. Mechanistically, the data can be interpreted qualitatively in several ways, but currently the most convincing argument suggests that a direct, impulsive encounter is involved.

Citation Download Citation

Kenneth A. Cowen, Yu-Fong Yen, K. Thomas Lorenz, and Brent D. Koplitz "Site-specific bimolecular chemistry: the reactivity of Cl atoms and butanes", Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); https://doi.org/10.1117/12.220838

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