
TY  - JOUR
A1  - Huang, Cheng-Liang 
A1  - Jiang, Jyh-Chiang 
A1  - Lin, Sheng Hsien 
A1  - Lee, Yuan T. 
A1  - Ni, Chi-Kung 
T1  - <emph type="2">Review</emph>: Photodissociation and Photoisomerization of Small Aromatic Molecules in a Molecular Beam
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2002
VL  - 54
IS  - 10
SP  - 561
EP  - 571
KW  - 
UR  - https://doi.org/10.1071/CH01134 
N2  - The photodissociation and photoisomerization of (D3)toluene, (D6)m-xylene, 4-fluorotoluene, &#945;&#8722;fluorotoluene, and &#945;,&#945;,&#945;-trifluorotoluene in a molecular beam at 248 and 193 nm were studied by multimass ion imaging techniques. The dissociation channels, dissociation rates, and photofragment translational-energy distributions were obtained. A new isomerization pathway, from a six- to a seven-membered ring followed by rearomatization prior to dissociation, was observed for toluene and xylene after photonic exitation at 193 nm. This isomerization is significant as the carbon and hydrogen atoms of the methyl group are involved in an exchange with the atoms in the aromatic ring during the process. This complete isomerization was not observed for 4-fluorotoluene, &#945;-fluorotoluene and &#945;,&#945;,&#945;-trifluorotoluene. The dissociation rate of toluene at 248 nm is too slow to be measured, and the upper limit of the dissociation rates at 248 nm is estimated to be 104s&#8211;1. Manuscript received: 1 October 2001. Final version: 29 November 2001. 
ER  -

