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A magnetic isotopic effect in the triplet sensitized photolysis of dibenzoyl peroxide

✍ Scribed by R.Z. Sagdeev; T.V. Leshina; M.A. Kamkha; O.I. Belchenko; Yu.N. Molin; A.E. Rezvukhin

Publisher: Elsevier Science
Year: 1977
Tongue: English
Weight: 197 KB
Volume: 48
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(77)80220-0

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✦ Synopsis

A t3C isotopic effect wasdetected in the triplet sensitized photolysis of dibenzoyl peroxide. Analysis of 13C NXR spectra shows that the amount of 13C in position 1 of phenyl benzoate, the cage product, increases by 23 f 5% in comparison with natural abundance. The observed isotopic effect considerably exceeds the known **C/13C kinetic isotopic effects. This effect is believed to be magnetic in origin and is explaiaed in terms of the dependence of the recombination probabiIities of radic'al pairs in the cage on the electron-nuclear hyperfine interaction.

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