SCHEDULED MAINTENANCE
Evidence is presented to show that a reaction channel exists for the addition of a methyl radical to the central carbon atom of a delocalised –[graphic omitted]–CH![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
[graphic omitted]R–system (X = O or NH) requiring a kinetic energy of ca. 40 kJ mol–1, since the delocalisation energy is lost in the addition process.
J. R. Kalman, R. B. Fairweather, G. Hvistendahl and D. H. Williams, J. Chem. Soc., Chem. Commun., 1976, 604 DOI: 10.1039/C39760000604
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