Journal of Physical Chemistry p. 15587 - 15594 (1995)
Update date:2022-08-17
Topics:
Mark, Stefan
Schellhammer, Christoph
Niedner-Schatteburg, Gereon
Gerlich, Dieter
The gas-phase ion-molecule reactions of CD3(1+)+C2H6 and of CD3(1+)+C3H8 were investigated in a guided ion beam apparatus.Several basic reaction mechanisms such as hydride, methylene, and ethylene transfer as well as eliminative and double-eliminative association were observed.Absolute integral cross sections were measured at collision energies ranging from 0.1 to 5 eV.The branching ratios are in good agreement with recent ion cyclotron resonance results.Velocity distributions of products (especially of very slow ones) were recorded by the guided ion beam time-of-flight (GIB-TOF) method.Thereby, direct type of reaction and reaction via a long-lived complex are distinguished.In contrast to previous crossed beam experiments, the hydride transfer has been identified to proceed via a direct mechanism, even at low collision energies.Partitioning of the total available energy into translational energy and internal excitation is estimated as a function of total energy.
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