| Abstract: | The rate coefficients for the removal of O(1D) by reaction with the following seven bromocarbons were measured using time-resolved vacuum UV atomic resonance fluorescence detection of O(3P): CH3Br, CH2Br2, CHBr3, CF3Br (Halon-1301), CF2Br2 (Halon-1202), CF2ClBr (Halon-1211), and CF2BrCF2Br (Halon-2402). The branching ratios for the quenching of O(1D) to O(3P) by the above molecules were also determined. From these measurements, the rate coefficients for reactive and nonreactive loss of O(1D) were calculated. These results are discussed in terms of their atmospheric relevance and trends in reactivity of O(1D) with hydrocarbons upon halogen substitution. © 1993 John Wiley & Sons, Inc. |
