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Vacuum Ultraviolet Photolysis of Ethyl Bromide at 123.6 nm

  • Hee-Soo Yoo (Department of Chemistry, Korea Advanced Institute of Science) ;
  • K. H. Jung (Department of Chemistry, Korea Advanced Institute of Science)
  • Published : 1980.03.30

Abstract

A vacuum ultraviolet photolysis of ethyl bromide was studied in the pressure range of 0.5-19.9 torr and at 123.6 nm krypton resonance line. The pressure effect on the reaction was studied by increasing the reactant pressure and by adding an inert gas, e.g., He. In the observation the monatomic gas is found to be no effect in the reaction. A scavenger effect of the reaction was also performed by adding NO gas as a radical scavenger and was found to be quite efficient to scavenge a radical product $C_2H_6$. The observation of the major reaction product $C_2H_6$ was interpreted in terms of a molecular elimination. Nontheless the decreasing phenomenon of ${\phi}_{C_2H_4}/{\phi}_{C_2H_6}$ with pressure rise was attributed to the existence of the two electronically excited states. One state proceeds to the molecular elimination and the other to carbon-bromine bond fission. The excitation and the decomposition mechanisms between two excited states and the reaction products were interpreted in terms of the first excitation which proceeds the molecular elimination, and the second excitation which resulted from the first excited state by collisional cross over decomposes by carbon-bromine bond fission.

Keywords

References

  1. Photochemistry J. G. Calvert;J. N. Pitts, Jr.
  2. J. Chem. Phys. v.56 T. Fujimotlo;M. H. J. Wijnen
  3. J. Opt. Soc. Amer. v.54 H. Okabe
  4. Int. J. Chem. Kinet. v.9 T. Ichimura;A. W. Kirk;E. Tschuikow-Roux
  5. J Photochem. v.6 T. Ichimura;A. W. Kirk;G. Kramer;E. Tschuikow-Roux
  6. J. Chem. Phys. v.4 W. C. Price
  7. Higher Excited States of Polyatomic Molecules v.1 M. B. Robin
  8. J. Chem. Phys. v.51 A. W. Kirk;E. Tschuikow-Roux
  9. NSRDS-NBS 21 S. W. Benson;H. E. O'Neal
  10. Can J. Chem. v.50 S. C. Chan;Y. Inel;E. Tschuikow-Roux
  11. J. Chem. Phys. v.55 J. C. Person;P. P. Nicole
  12. Z. Naturforach. v.27A P. Potzinger;L. C. Glasgow;G. von Buenau
  13. J. Opt. Soc. Amer. v.55 A. H. Laufer;J. A. Pirog;J. R. McNesby
  14. Photochemistry of Small Molecules H. Okabe
  15. Natl. Bur. Std Tech. Note v.496 R. Gordon., Jr.;R. E. Rebbert;P. Ausloos
  16. J. Phys. Chem. v.82 A. J. Rrandk;R. J. Hanrahan
  17. J. Chem. Soc. v.1963 R. Barker;A. Maccoll
  18. Int. J. Chem. Kinet. v.5 R. E. Robbert;S. G. Lias;P. Ausloos
  19. Int. J. Chem. Kinet. v.9 D. Salomln;A. W. Kirk;E. Tschuikow-Roux
  20. J. Phys. Chem. v.81 T. Ichimura;A. W. Kirk;E. Tschuikow-Roux
  21. J. Phys. Chem. v.83 T. Yano;E. Tschuikow-Roux
  22. Can J. Chem. v.52 L. Cremieux;J. A. Herman
  23. J. Phys. Chem. v.81 T. Ichimura;A. W. Kirk;E. Tschuikow-Roux

Cited by

  1. Photodecomposition reaction of ethyl bromide at 147 nm vol.16, pp.4, 1984, https://doi.org/10.1002/kin.550160409
  2. Collisional deactivation of vibrationally hot ethylene produced by the photoactivation of ethyl bromide at 121.6 nm vol.42, pp.1, 1988, https://doi.org/10.1016/1010-6030(88)80047-9