Translational distributions of fragments produced in the photodissociation of vinyl fluoride at 157 nm

✍ Scribed by Kei Sato; Sigeru Tsunashima; Toshiyuki Takayanagi; Ginji Fijisawa; Atsushi Yokoyama

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 406 KB
• Volume: 242
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00753-q

✦ Synopsis

The photodissociation of vinyl fluoride following electronic excitation at 157 nm has been studied using the techniques of mass-resolved photofragment time-of-flight spectroscopy. HF elimination has been observed as the main primary dissociation process. This channel has a translational energy distribution peaked at around 20 kcal/mol, indicating that the reaction has a substantial exit barrier. We conclude that HF is mainly produced via four-center elimination. Other primary reactions have also been observed and are tentatively assigned as the C-H bond rupture and H 2 elimination processes. The mechanisms of the unimolecular reactions of vinyl fluoride are discussed on the basis of ab initio molecular orbital calculations.