State-to-state dynamics of the Cl + CH3OH --> HCl + CH2OH reaction.

摘要: Molecular chlorine, methanol, and helium are co-expanded into a vacuum chamber using custom designed "late-mixing" nozzle. The title reaction is initiated by photolysis of Cl2 at 355 nm, which generates monoenergetic Cl atoms that react with CH3OH collision energy 1960 +/- 170 cm(-1) (0.24 0.02 eV). Rovibrational state distributions the nascent HCl products obtained via 2 + 1 resonance enhanced multiphoton ionization, center-of-mass scattering measured core-extraction technique, average internal co-products deduced measuring spatial anisotropy products. majority (84 7%) formed in HCl(v = 0) an rotational [Erot] 390 70 cm(-1). remaining 16 7% 1) have 190 30 primarily forward scattered, they coincidence CH2OH little energy. In contrast, significant These results indicate two or more different mechanisms responsible for dynamics reaction. We suggest (1) from collisions high impact parameter stripping mechanism act as spectators, (2) over wide range parameters, resulting both rebound active participants. all cases, fast hydrogen on methyl group, not hydroxyl group.