- Author
- Fahr, A. | Mallard, W. G. | Stein, S. E.
- Title
- Reactions of Phenyl Radicals With Ethene, Ethyne, and Benzene.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Book or Conf
- Combustion Institute, Symposium (International) on Combustion, 21st. August 3-8, 1986, Combustion Inst., Pittsburgh, PA, Munich, West Germany, 825-832 p., 1986
- Keywords
- phenyls | radicals
- Abstract
- In a low pressure flow reactor, rates for the dispolacement of H atoms from unsaturated molecules by phenyl radicals have been measured relative to phenyl radical recombination. Assuming a rate constant for the latter process of 10(9.5)M(-1)s(-1), the rate constants at 1030 K for displacement reaction from ethyne, ethene, and benzene are: Ph* + C2H4 = PhC2H3 + H k = 1.23 x 10(8) M(-1) s(-1) Ph* + C2H2 = PhC2H + H k = 1.62 x 10(8) M(-1) s(-1) Ph* + PhH = Ph-Ph + H k = 2.95 x 10(7) M(-1) s(-1) The role of the reversibility of the formation of the initial radical-molecule complex is investigated by determining D-displacement rates for deuterated ethyne and benzene. Reversibility is important in the latter case, but not in the former.