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Abstract
The photodissociation reactions of the 3-chloro-1-propyne and 3-bromo-1-propyne radical ions have been studied using a laser-ion beam photodissociation apparatus. The photodissociation spectra reflect the spin-orbit splitting of the ground electronic states of the ion. The C 3H 3Cl + and C 3H 3Br + systems dissociate to yield exclusively C 3H 3 + in the total energy range 12.9–13.7 eV. This reaction channel is assigned to a direct dissociation from a repulsive electronic state. Finally, comparisons between the unimolecular and the photofragment kinetic energy release values suggest a propargyl structure for the C 3H 3 + photofragment ion.
Published Version
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