Kinetic Hydrogen/Deuterium Isotope Effects in Multiple Proton Transfer Reactions
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Hans-Heinrich Limbach
Abstract
In this paper, a description of multiple kinetic isotope effects (MKIE) of degenerate double, triple and quadruple proton transfer reactions in terms of formal kinetics is developped. Both single and multiple barrier processes are considered, corresponding to so-called “concerted” and “stepwise” reaction pathways. Each step is characterized by a rate constant and the transfer of a given H isotopes or ensemble of H isotopes. The MKIE are expanded in terms of kinetic H/D isotope effects P contributed by single sites in which a proton is transferred in the rate limiting steps. By combination with a modified Bell tunneling model the formalism developed can be used in order to take into account tunneling effects of both concerted and stepwise multiple proton transfers at low temperatures.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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Articles in the same Issue
- EXAFS Spectroscopy – Fundamentals, Measurement Techniques, Data Evaluation and Applications in the Field of Phthalocyanines
- Kinetic Hydrogen/Deuterium Isotope Effects in Multiple Proton Transfer Reactions
- Nanomaterials as Flow Regulators in Dry Powders
- Scanning Electrochemical Microscopy as a Versatile Tool for Modifying Surfaces
- The Absorption Spectrum of Anisole and the Anisole/CO2 1:1-Cluster. The Influence of Intermolecular Interaction on Intramolecular Vibrations
- The Kinetics and Quantum Dynamics of Intramolecular Rearrangements in Highly Symmetrical Complexes: The Berry Pseudorotation
- High Time Resolution Multifrequency EPR of Radical Pair Intermediates in Photosynthetic Reaction Centers: Structure Determination on a Nanosecond Time Scale
- Book Reviews
