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Ying Guo, Xibin Gu, Fangtong Zhang, Ralf I. Kaiser Department of Chemistry University of Hawai’i

Reaction Dynamics in the C( 3 P) + C 2 H 2 (X 1  g + ) System. Ying Guo, Xibin Gu, Fangtong Zhang, Ralf I. Kaiser Department of Chemistry University of Hawai’i Honolulu, HI 96822 kaiser@gold.chem.hawaii.edu http://www.chem.hawaii.edu/Bil301/welcome.html. Introduction.

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Ying Guo, Xibin Gu, Fangtong Zhang, Ralf I. Kaiser Department of Chemistry University of Hawai’i

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  1. Reaction Dynamics in the C(3P) + C2H2(X1g+) System Ying Guo, Xibin Gu, Fangtong Zhang, Ralf I. Kaiser Department of Chemistry University of Hawai’i Honolulu, HI 96822 kaiser@gold.chem.hawaii.edu http://www.chem.hawaii.edu/Bil301/welcome.html

  2. Introduction Science, 274, 1508 (1996) 8.8, 28, 45 kJmol-1 c-C3H(X2B2) l-C3H(X2)

  3. Introduction relative energy, kJmol-1 l-C3(X1g+) + H2(X1g+) RG = - 124 kJmol-1

  4. Introduction Faraday Discussions 119, 27 (2001) Faraday Discussions 119, 51 (2001) l-C3(X1g+) + H2(X1g+) Mebel et al. JACS 120, 5751 (1998)  C3 formation via ISC

  5. Introduction relative energy, kJmol-1

  6. Open Questions relative energy, kJmol-1

  7. m/z 37 36 39 38 38 36 38 37 36

  8. 13

  9. C(3P) + C2D2(X1g+) c-C3D(X2B2) + D(2S) RG = - 2 kJmol-1 l-C3D(X2) + D(2S) RG = + 8 kJmol-1 l-C3(X1g+) + D2(X1g+) RG = - 126 kJmol-1 c-C3(X3A2’) + D2(X1g+) RG = - 43 kJmol-1 Ochsenfeld et al. JCP 106, 4141 (1997) Mebel et al. CPL 360, 139 (2002)

  10. m/z 37 36 39 38 38 36 38 37 36

  11. Crossed Molecular Beams Setup

  12. C(3P) + C2H2 (8 kJmol-1; m/z = 37) C3H C4H (usec)

  13. C(3P) + C2H2 (8 kJmol-1; m/z = 36) C3H C4H C3(R) C3(E) (usec)

  14. C(3P) + C2H2 (20.4 kJmol-1; m/z = 37) C3H C4H (usec)

  15. C(3P) + C2H2 (20.4 kJmol-1; m/z = 36) C3H C3H C4H C4H C3(R) C3(E) (usec)

  16. C(3P) + C2H2 (30.7 kJmol-1; m/z = 37) C3H C4H (usec)

  17. C(3P) + C2H2 (30.7 kJmol-1; m/z = 36) C3H C3H C4H C4H C3(R) C3(E) (usec)

  18. C(3P) + C2H2 C3(R) C3H C4H C3(E) m/z = 37 m/z = 36

  19. C(3P) + 13C2H2

  20. C(3P) + 13C2H2 C3(R) C3H C4H l-C3(X1g+) + H2(X1g+) m/z = 39 m/z = 38

  21. C(3P) + C2H2/13C2H2 C3H//13C2CH C(3P)  H 13C2C C(3P)  H2

  22. C(3P) + C2H2/13C2H2

  23. Summary

  24. m/z 37 36 39 38 38 36 38 37 36

  25. Ionization Potentials of C3H Isomers Chemical Dynamics Beamline Advanced Light Source C2H2 C3H L. Belau, S. Leone, M. Ahmed, R.I. Kaiser

  26. C6H2 C3H C4H2 C4H

  27. Ionization Potentials IP(l-C3H) = 9.06 eV IP(c-C3H) = 9.66 eV  0.1 eV B. Braams J. Bowman Experiments* IP(l-C3H) = 9.1 eV IP(c-C3H) = 9.6 eV  0.1 eV *L. Belau S. Leone M. Ahmed R.I. Kaiser

  28. Acknowledgements L. Belau S. Leone M. Ahmed B. Braams J. Bowman Y. Guo, F. Zhang, X. Gu

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