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There are different estimations on the relative O–H bond dissociation enthalpy (BDE) of catechol, ranging from 4.6 kcal mol−1 to 14.1 kcal mol−1 lower than that of phenol. Through a kinetic analysis, the relative O–H BDE of −7.2 kcal mol−1 was supported.
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Hong‐Yu Zhang (2003) studied this question.
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