The Reactions of 1CH2(ã1A1) with C2HxF4‐x(x = 0, 2, 3, 4) and 1, 1‐C2HF2CI

Abstract

AbstractThe rate constants of the reactions of 1CH2 with C2H4, CH2 = CF2, CHF = CHF, CF2 = CHF, C2F4, and CF2 = CHCl were investigated with a laser photolysis/laser induced fluorescence apparatus at room temperature under quasistationary conditions. 1CH2 was produced via photolysis of ketene. The obtained rate constants show a regular dependence on the amount of fluorine substitution: an increasing fluorine part leads to a decrease of the overall rate constant. This also holds for CF2 = CHCl, which shows nearly the same reactivity towards 1CH2 as CF2 = CHF does. Some of the investigated reactions were measured for both 1CH2(v = 0) and 1CH2(v = 1). The obtained rate constants are very similar.In the reactions of 1CH2 with CH2 = CF2, CF2 = CHF and C2F4 the radical 1CF2 could be detected as a reaction product. In the 1CH2 reactions with CHF = CHF and CF2 = CHF the radical 1CHF could be observed.These results underline the importance of the addition channel for this kind of reactions.