Photodissociation Dynamics of the Phenyl Radical via Photofragment Translational Spectroscopy

Details Photodissociation Dynamics of the Phenyl Radical via Photofragment Translational Spectroscopy Photodissociation Dynamics of the Phenyl Radical via Photofragment Translational Spectroscopy

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confera12n&link_type=abstract

"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec

Physics

Dynamics

Scientific paper

Photofragment translational spectroscopy was used to study the photodissociation dynamics of the phenyl radical at 193 and 248 nm. Time of flight data collected for the C_6H_4, C_4H_3, and C_2H_2 photofragments show the presence of two decomposition channels. The only C_6H_5 decomposition channel observed at 248 nm corresponds to C-H bond fission from the cyclic radical producing ortho-benzyne. The translational energy distribution peaks at 0 kcal/mol and is consistent with no exit barrier for the H loss process. At 193 nm photodissociation, however, H loss was observed to be the minor channel, while the major decomposition pathway corresponds with decyclization of the C_6H_5 radical and subsequent fragmentation to n-C_4H_3 and C_2H_2. These two momentum matched photofragments have a translational energy distribution that peaks around 9 kcal/mol, indicative of a process that proceeds through a tighter transition state. Previous theoretical work on the unimolecular decomposition of the phenyl radical predicts a second H loss process that occurs after C_6H_5 decyclization resulting in the linear C_6H_4 photofragment. This channel cannot be unambiguously discerned from the C_6H_4^+ time of flight data, but is believed to take place since decyclization is observed.
L. K. Madden, L. V. Moskaleva, S. Kristyan, and M. C. Lin J. Phys. Chem. A 1997, 101, 6790.

Affiliated with

Also associated with

No associations

Rating

Photodissociation Dynamics of the Phenyl Radical via Photofragment Translational Spectroscopy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Photodissociation Dynamics of the Phenyl Radical via Photofragment Translational Spectroscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photodissociation Dynamics of the Phenyl Radical via Photofragment Translational Spectroscopy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1591499