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. 2020 May 27;9(6):461. doi: 10.3390/antiox9060461

Table 6.

Values of reorganization enthalpies and hydrogen abstraction enthalpies [kcal/mol].

Flavonoid Reorganization Enthalpies Hydrogen Abstraction Enthalpies
C2’ C3’ C4’ C5’ C3 C5 C7 C2’ C3’ C4’ C5’ C3 C5 C7
Flavones Acacetin 8.7 −5.1 93.5 86.0
Apigenin −6.7 7.1 −5.0 82.6 93.5 86.7
Chrysin 8.6 −5.6 93.5 87.2
Chrysoeriol 7.7 −2.4 −5.2 79.3 104.3 86.5
Diosmetin 7.2 −2.4 −5.4 80.6 104.4 86.6
Genkwanin −6.3 8.5 82.4 93.7
Luteolin −7.0 8.6 −1.7 −5.0 81.2 75.9 104.4 86.8
Flavonols Fisetin −7.5 −7.8 9.1 −5.9 75.9 77.3 77.6 84.4
Galangin 8.6 −8.4 −5.8 78.3 90.1 85.9
Kaempferol −6.9 8.7 −8.5 −5.5 79.8 76.8 89.8 84.8
Morin −8.4 −6.2 12.6 −9.1 −5.3 85.0 82.6 72.1 90.0 86.1
Myricetin −6.8 −8.3 −7.2 9.4 −8.5 −6.0 80.7 72.4 77.1 76.7 89.8 85.0
Quercetin −7.0 −8.0 8.8 −8.7 −5.6 80.4 73.4 76.7 89.3 84.9

The numbers in bold typeface indicate the lowest value for a given compound.