THE REACTIONS OF (CH2)-C-1((A)OVER-TILDE(1)A(1)) WITH C2HXF4-X (X=0,2,3,4) AND 1,1-C2HF2CL

The rate constants of the reactions of (CH2)-C-1 with C2H4, CH2=CF2, C HF=CHF, CF2=CHF, C2F4, and CF2=CHCl were investigated with a laser pho tolysis/laser induced fluorescence apparatus at room temperature 2 und er quasistationary conditions. (CH2)-C-1 was produced via photolysis o f 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 (CH2)-C-1 as CF2=CHF does. Some of the investigated reactions were measured for both (CH2)- C-1(v=0) and (CH2)-C-1(v=1). The obtained rate constants are very simi lar. In the reactions of (CH2)-C-1 with CH2=CF2, CF2=CHF and C2F4 the radical (CF2)-C-1 could be detected as a reaction product. In the (CH2 )-C-1 reactions with CHF=CHF and CF2=CHF the radical (CHF)-C-1 could b e observed. These results underline the importance of the addition cha nnel for this kind of reactions.