heavy atom effect

https://doi.org/10.1351/goldbook.H02756
The enhancement of the rate of a spin-forbidden process by the presence of an atom of high @[email protected], which is either part of, or external to, the excited molecular entity. Mechanistically, it responds to a @[email protected] enhancement produced by a heavy atom.
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2245 [Terms] [Paper]
Cite as: IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.
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Last revised: February 24, 2014