Table 5.
Values of proton affinity enthalpies and electron transfer enthalpies [kcal/mol].
| Flavonoid | Proton Affinity Enthalpy | Electron Transfer Enthalpy | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C2’ | C3’ | C4’ | C5’ | C3 | C5 | C7 | C2’ | C3’ | C4’ | C5’ | C3 | C5 | C7 | ||
| Flavones | Acacetin | 45.0 | 30.8 | 87.0 | 90.2 | ||||||||||
| Apigenin | 31.8 | 43.3 | 31.4 | 87.4 | 87.1 | 90.1 | |||||||||
| Chrysin | 44.3 | 31.0 | 87.7 | 91.7 | |||||||||||
| Chrysoeriol | 33.3 | 45.0 | 30.7 | 83.5 | 91.6 | 90.8 | |||||||||
| Diosmetin | 36.7 | 45.3 | 30.7 | 81.0 | 91.4 | 91.1 | |||||||||
| Genkwanin | 31.1 | 46.0 | 87.5 | 86.0 | |||||||||||
| Luteolin | 35.8 | 27.4 | 43.8 | 31.3 | 82.3 | 86.8 | 92.1 | 90.3 | |||||||
| Flavonols | Fisetin | 30.7 | 34.1 | 38.5 | 30.0 | 82.6 | 80.8 | 78.1 | 90.2 | ||||||
| Galangin | 35.2 | 40.8 | 30.3 | 81.6 | 87.6 | 91.3 | |||||||||
| Kaempferol | 32.0 | 35.5 | 42.0 | 30.1 | 84.6 | 79.8 | 86.2 | 90.1 | |||||||
| Morin | 39.2 | 32.1 | 28.3 | 40.6 | 29.5 | 84.0 | 86.6 | 86.2 | 88.3 | 91.8 | |||||
| Myricetin | 36.0 | 29.1 | 30.1 | 34.9 | 41.2 | 29.9 | 81.3 | 81.5 | 84.2 | 81.0 | 87.0 | 90.9 | |||
| Quercetin | 36.7 | 27.2 | 35.5 | 41.5 | 30.0 | 80.6 | 84.0 | 79.8 | 86.4 | 90.3 | |||||
The numbers in bold typeface indicate the lowest value for a given compound.