
Keywords: پتانسیل یونیزاسیون; (4αâ6â³, 2α â O â 1â³)-phenylflavans; Catechin; Proanthocyanidins; Antioxidants; Density functional theory; Atoms in molecules; Natural bond orbital analysis; Bond dissociation enthalpies; Ionization potentials; Donor-acceptor interactions;