Unusual mechanisms can dominate reactions at hyperthermal energies: An example from O(3P) + HCl → ClO + H

Jianming Zhang, Jon P. Camden, Amy L. Brunsvold, Hari P. Upadhyaya, Timothy K. Minton, George C. Schatz

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An unusual mechanism in the reaction, O(3P) + HCl → ClO + H, dominates at hyperthermal collision energies. This mechanism applies to collision geometries in which the H atom in the HCl molecule is oriented toward the reagent O atom. As the Cl-O bond forms, the H atom experiences a strong repulsive force from both the O and Cl atoms. The ClO product scatters forward with respect to the initial velocity of the O atom, and the H atom scatters backward. This mechanism accounts for more than half the reactive trajectories at energies >110 kcal mol-1, but it does not involve motion near the minimum energy path, which favors an SN2-like reaction mechanism where the H atom is oriented away from the reagent O atom during the collision.

Original languageEnglish
Pages (from-to)8896-8897
Number of pages2
JournalJournal of the American Chemical Society
Issue number28
Publication statusPublished - Jul 16 2008


ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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