FTIR Study of the Cl + C2H2 Reaction: Formation of cis- and trans-CHCl=CH Radicals

Article abstract of DOI:10.1021/j100070a020

FTIR spectroscopic studies of the photolysis (λ >/= 300 nm) of mixtures containing Cl2 and C2H2, cis-CHCl=CHCl, or trans-CHCl=CHCl were carried out in 700 Torr of N2 at 295 +/- 2 K.On the basis of the kinetic analysis of cis- and trans-CHCl=CHCl formed from C2H2, the branching ratio k_1a/k_1b has been determined to be 0.19 +/- 0.05.Cl + C2H2 (+M) -> cis=ClCH-CH (+M); Cl + C2H2 (+M) -> trans-ClCH=CH (+M).Implications of these results for our previously postulated mechanism of Cl atom initiated oxidation of C2H2 are discussed.