Endothermic reactions of Ni+ with H2, HD and D2 |
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Authors: | PB Armentrout JL Beauchamp |
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Abstract: | An ion-beam apparatus is employed to study the reaction of Ni+ with H2, HD, and D2 as a function of kinetic energy. These reactions lead to the endothermic formation of NiH+, NiH+ and NiD+, and NiD+, respectively. Interpretation of the threshold for these processes yields the average bond energies, D0(Ni+H) = 1.86 ± 0.09 eV and D0(Ni+D) = 1.90 ± 0.14 eV. The total reaction cross sections for all three systems are similar; however, a striking isotope effect is observed for Ni+ reacting with HD. The dependence of the cross sections on relative kinetic energy is discussed in terms of simple models for reaction. |
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