Unravelling the reactivity of antisymmetric stretch-excited CH4 with Cl by-product pair-correlation measurements

The vibrational branching ratio [CH3(v = 0) + HCl(v' = 1)]/ [CH3(v = 0) + HCl(v' = 0)] of two correlated product pairs from the title reaction shows a dramatic E-c-dependence, in sharp contrast to the previously observed behavior in Cl + CHD3(v(1) = 1), while the vibrational enhancement factors in reactivity of the two reactions are remarkably similar.