Heavy—heavy—light limit and exchanged-atom isotopic effects in atom—diatom reactivity
✍ Scribed by Antonio Laganà; Antonio Aguilar; Xavier Gimenez; Jose' M. Lucas
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 524 KB
- Volume
- 189
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The validity of arbitrarily increasing the mass of the exchanged atom when calculating reduced-dimensionality three-dimensional quantum cross sections for heavy-heavy-light reactions has been investigated by considering, as a case study, the Li + FH+LiF+ H system. This exchanged-atom isotopic effect was found to have opposite sign at large and small collision angles, resulting in a partial error compensation for reactions having a bent transition state.
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## Abstract A convenient approach to compute kinetic isotope effects (KIEs) in condensed phase chemical reactions is via path integrals (PIs). Usually, the primitive approximation is used in PI simulations, although such quantum simulations are computationally demanding. The efficiency of PI simula