Photodissociation of 1,2-C2H2Br2 at 248 nm: Competition between three-body formation Br+Br+C2H2 and molecular Br2 elimination

Article abstract of DOI:10.1063/1.1387476

The photodissociation of 1,2-C₂H₂Br₂ was studied using product translational spectroscopy. A detector consisting of an electron impact ionizer, quadrupole mass filter and Daly type ion counter was used to measure the dissociation production after travelling a flight path of 365 mm from the reaction zone. Experimental analysis suggested that the dissociation of the molecule into triple products was due to an asynchronous concerted reaction. Behavior of the molecule in the presence of additional bromine atom and the molecular elimination of Br₂ were also studied. The product anisotropy indicated that both Br fragments were produced in a fraction of rotational period.