Abstract
AbstractThe dynamics of photodissociation of small halogenated alkanes, in both their ground and vibrationally excited states, is investigated. The yield of H, Cl(2P2/3), and Cl(2P1/2) 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 CHF2Cl, CH3CF2Cl, CH3CFCl2, and OH3Cl and the 237–243 nm photolysis of CH3Cl 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.
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