The photodissociation of ground and vibrationally excited halogenated alkanes Academic Article uri icon


  • Abstract The dynamics of photodissociation of small halogenated alkanes, in both their ground and vibrationally excited states, is investigated. The yield of H, Cl (2 P 2/3), and Cl (2 P 1/2) fragments was measured by (2+ 1) resonance-enhanced multiphoton ionization in a time-of-flight mass spectrometer. We report results from the 193 nm photolysis of ground state CHF 2 Cl, CH 3 CF 2 Cl, CH 3 CFCl 2, and OH 3 Cl and the 237–243 nm photolysis of CH 3 Cl excited to the fourth C–H stretch overtone level. The branching ratios depend on the molecular structure, the accessed excited potential surfaces and, as a consequence, on the dissociation dynamics.

publication date

  • January 1, 1997