SEARCH Articles Figures Tables And valence tautomerism Bandgap affected by an aromatic vs quinonoid valence tautomerism Bond-valence tautomerism Bullvalene valence tautomerism Charge-localized and -delocalized Valence Tautomeric Forms of Cyclic Oxocarbon Dianions Cycloheptatrienes-norcaradiene valence tautomerism Cyclooctatetraene complexes valence tautomerism Mesomeric betaines valence tautomerism Methano annulenes valence tautomerism Ring-Chain and Valence Bond Tautomerism Tautomerism and Valence Isomerism Tautomerism, photochemical valence Valence tautomeric system Valence tautomerism arene oxide-oxepin Valence tautomerization Valence tautomerization Valence tautomerizations