Abstract
THE application of the flash photolysis technique to the study of the photodecomposition of molecules like ozone1,2, nitrogen dioxide3 and chlorine dioxide3, by Norrish and co-workers, has revealed the occurrence of a very unusual series of reactions of the general type : 
in which a large proportion of the heat of reaction remains concentrated as vibrational energy in the newly formed bond A—B. Table 1 summarizes the known reactions of this type, together with two apparently analogous reactions in which no vibrationally excited AB has been detected.
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References
McGrath, and Norrish, Proc. Roy. Soc., A, 242, 265 (1957).
McGrath, and Norrish, Z. phys. Chem. (Frankfurt), 15, 245 (1958).
Lopscomb, Norrish, and Thrush, Proc. Roy. Soc., A, 233, 455 (1956).
Norrish, Liverside Lecture, Proc. Chem. Soc., 247 (1953).
Evans, and Polanyi, Trans. Farad. Soc., 35, 178 (1939).
Oldershaw, and Norrish, Proc. Roy. Soc., A, 249, 498 (1958).
Edgcombe, Norrish, and Thrush, Proc. Roy. Soc., A, 243, 24 (1957).
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SIMONS, J. A Model to account for the Production of Vibrationally Hot Molecules in Free-Radical Reactions. Nature 186, 551–552 (1960). https://doi.org/10.1038/186551a0
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DOI: https://doi.org/10.1038/186551a0
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