| Popis: |
Angular distribution measurements of methyl iodide reactive scattering from crossed beams of methyl radicals and halogen molecules, ICl, IBr, I2 are reported. The methyl radical beam is generated by pyrolysis of azomethane flowing through a heated tantalum tube at ∼1600 K; the halogen molecule beam issues from a nozzle beam source at ∼380 K. Reactively scattered methyl iodide is detected by an electron bombardment mass spectrometer. The differential cross sections peak sideways in centre-of-mass coordinates, showing a marked similarity to the corresponding deuterium atom–halogen molecule reactions. Qualitative molecular orbital theory offers a comprehensive rationalisation of methyl radical, deuterium atom and halogen atom reaction dynamics with halogen molecules. |
