Intramolecular vibrational energy redistribution

Intramolecular vibrational energy redistribution (IVR) is a process in which energy is redistributed between different quantum states of a vibrationally excited molecule, which is required by successful theories explaining unimolecular reaction rates[1][2] such as RRKM theory. Such theories assume a full statistical redistribution between all vibrational modes, but restricted redistribution could enable bond selective chemistry for which deposited energy must remain in a particular mode for as long as it takes for the required reaction to take place.[3]


  1. ^ Gilbert, R. G. (1990). Theory of unimolecular and recombination reactions. Blackwell Scientific.
  2. ^ Baer, T.; Hase, W. L. (1996). Unimolecular Reaction Dynamics: Theory and Experiments. Oxford University Press.
  3. ^ Fielding, H. H.; Dunn, A. D. G. (2010). in Tutorials in Molecular Reaction Dynamics.