標題: | Dynamics of the F-2 Reaction with Propene: The Effect of Methyl Substitution |
作者: | Fang, Jing-Wen Xie, Tingxian Chen, Hsueh-Ying Lu, Yu-Ju Lee, Yuan T. Lin, Jim J. 應用化學系 Department of Applied Chemistry |
公開日期: | 23-四月-2009 |
摘要: | The reaction of F-2 + C3H6 has been investigated with the crossed molecular beam technique. The only observed primary product channel is F + C3H6F while the HF + C3H5F channel cannot be found. The reaction cross section was measured as a function of collision energy and the reaction threshold was determined to be 2.4 +/- 0.3 kcal/mol. Compared to the reaction threshold of the F-2 + C2H4 reaction, the methyl substitution effectively reduces the reaction threshold by about 3 kcal/mol. The product time-of-flight spectra and angular distributions were measured and analyzed. The angular distribution displays strongly backward, indicating that the reaction is much faster than rotation. All experimental results support a rebound reaction mechanism, which agrees with the structure of the calculated transition state. The transition state geometry also suggests an early barrier; such dynamics is consistent with the observed small kinetic energy release of the products. Except for the different values of the reaction thresholds, the dynamics of the F-2 + C2H4 and F-2 + C3H6 reactions are remarkably similar. |
URI: | http://dx.doi.org/10.1021/jp811053d http://hdl.handle.net/11536/149770 |
ISSN: | 1089-5639 |
DOI: | 10.1021/jp811053d |
期刊: | JOURNAL OF PHYSICAL CHEMISTRY A |
Volume: | 113 |
起始頁: | 4381 |
結束頁: | 4386 |
顯示於類別: | 期刊論文 |