Alkyl Iodide-Iodine Exchange and the Szilard-Chalmers Effect

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Science  11 Jun 1965:
Vol. 148, Issue 3676, pp. 1460-1461
DOI: 10.1126/science.148.3676.1460


The rate of isotopic exchange between liquid ethyl iodide and dissolved iodine is of zero order with respect to iodine concentration. Apparent isotopic exchange is thus very rapid at low concentrations of iodine, and previously reported values of organic "retention," obtained in studies of (n, γ) recoil in alkyl iodide, are placed in doubt.