Abstract
AbstractGas phase reactions of CH2(ã1A1) with benzene C6H6 and acetylene C2H2 were investigated at room temperature. CH2(ã1A1) was generated by laser photolysis of CH2CO at λL = 308 nm and the reactions were monitored directly by measuring the removal of CH2(ã1A1) with laser‐induced fluorescence (LIF). For the measurement of the formation rate of 3CH2 by physical deactivation LMR detection was used. The total removal of CH2(ã1A1) was found to be very efficient with rate constants of 2.4 ± 0.5 and 2.2 ± 0.2 (in 1014 cm3/mol s) for C6H6 and C2H2, respectively. The physical deactivation of 1CH2 to 3CH2 is about 30 resp. 22 percent of the total removal rate. Activation rates of 3CH2 to 1CH2 are give
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