Kinetics and Mechanisms of the CO2 Laser Induced Decompositions of CFCl3 and CF2Cl2
The kinetics and reaction mechanisms of the decomposition of CFCl3 and CF2Cl2 induced by a continuous CO2 laser are examined and compared with previous results for CF3Cl.All three compounds exhibit two temperature regimes, with similar reaction mechanisms in the low-temperature regimes and significantly different mechanisms in the high-temperature regimes.
Zitter, R. N.,Koster, D. F.,Choudhury, T. K.,Cantoni, A.
IR Laser Chemistry and C-F Chromophore Absorption of 1,2-Dichloro-1,1,2-trifluoroethane
The photochemical-reaction yields after IR multiphoton excitation of CHFCl-CF2Cl are reported and evaluated in terms of the steady-state rate coefficient for reactant decay k(st) = 106.1+/-0.3(I/MWcm-2)s-1).The dominant primary reaction channels are α,β HCl and HF elimination, although minor pathways seem to include Cl2 elimination and other channels, which are discussed.The major uncertainty in the comparison with theoretical estimates resides in the fraction of C-F chromophore band strength with contributes to excitation.The total band strength for the range from 940 cm-1 to 1310 cm-1 is reported to be G = = 8.2 pm2.