COMPETITION BETWEEN HYDROGEN FLUORIDE AND HYDROGEN CHLORIDE MOLECULAR ELIMINATION CHANNELS IN THE INFRARED MULTIPLE-PHOTON DECOMPOSITION OF 1,2-DICHLORO-1,1-DIFLUOROETHANE.

Article abstract of DOI:10.1246/bcsj.57.681

Time-resolved infrared emission spectra have been measured in the infrared multiple-photon decomposition of CClF//2CH//2Cl. The spectra were composed of emissions attributable to vibrationally excited HF* and HCl*. The emission yield of HF* increased rapidly with an increase in the fluence, while the yield of HCl* showed a maximum at 20 J cm** minus **2. These results suggest that the HF and HCl molecular elimination channels compete with each other in the unimolecular decomposition of highly vibrationally excited parent molecules. The stochastic trajectory calculations provided a satisfactory description of the fluence dependences of the HF and HCl yields observed here for CClF//2CH//2Cl and previously for CHClFCHClF.