In the textbook of "A Guidebook to Mechanism in Organic Chemistry" by Peter Sykes, it is mentioned that peroxides are radical sources and quinones are radical absorbers or scavengers, but it had no explanation, and quick search gave results about HALS, but not about quinones. Also I understand that peroxides can act as radical sources due to homolytic cleavage and its 'O-O' bond energy being very low, around 140 kJmol^-1. But can you explain how quinones are good radical scavengers? Also its mechanism, if any, would be appreciated.


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