radical centre(s)

https://doi.org/10.1351/goldbook.R05069
The atom (or group of atoms) in a polyatomic radical on which an unpaired electron is largely localized. @A00512@ of a monovalent atom to a radical centre gives a molecule for which it is possible to write a @L03513@ in which the normal @S05900@ valencies are assigned to all atoms.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1156 [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