Table . The singlet-triplet Gibbs free energy gaps, S-T gaps, corrected for zero-point energies at 298.15 K in kcal.mol , and natural atomic charges, q, of anionic branching carbon (C1) and the cationic one-carbon bridges (Cb) in structures 1, 2 and 3, listed in Figure . All data are computed for DMF as the solvent model.