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Intramolecular Vibrational Energy Redistribution 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]
^Gilbert, R. G. (1990). Theory of unimolecular and recombination reactions. Blackwell Scientific.
^Baer, T.; Hase, W. L. (1996). Unimolecular Reation Dynamics: Theory and Experiments. Oxford University Press.
^Fielding, H. H.; Dunn, A. D. G. (2010). in Tutorials in Molecular Reaction Dynamics.
It differs from vibrational energy relaxation in that modes isoenergetic to the original excitiation are populated and vibrational energy is conserved, as opposed to lower energy modes being populated through a loss of vibrational energy.[1][2]
^Cite error: The named reference Gilbert1990 was invoked but never defined (see the help page).
^Cite error: The named reference Baer_1996 was invoked but never defined (see the help page).