Picosecond dissociation of ketene: Experimental state-to-state rates and tests of statistical theories

E. D. Potter, M. Gruebele, L. R. Khundkar, A. H. Zewail

Research output: Contribution to journalArticle

Abstract

The state-to-state dissociation rates of ketene have been measured for a variety of singlet methylene rotational states in both the ground and (010) vibrational levels of the methylene fragment. Measured time constants range from 1.0 ns at 500 cm-1 to 19 ps at 5600 cm-1 above threshold. The measurements cannot be accounted for by simple phase space theory (PST), which has been used to explain product state distributions, or tight transition state RRKM theory, but are in good agreement with variational RRKM theory. The estimated threshold rate of 2×108 s-1 is in agreement with the previous lower limit of 7×107 s-1 of Chen, Green and Moore.

Original languageEnglish (US)
Pages (from-to)463-470
Number of pages8
JournalChemical Physics Letters
Volume164
Issue number5
DOIs
StatePublished - Dec 22 1989

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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