SEARCH Articles Figures Tables A Spin-Free Approach for Valence Bond Theory and its Ab Initio Spin-Free Valence Bond Program Application The Free Valency Index Benzene free valency Catalyst, free valencies Descriptor free valences Dispersion free valence Free valence definition Free valence electric field gradient Free valence index Free valence number Free valence number, correlation Free valence number, correlation reactivities with Free valencies Free valencies Free valency index Free, electron molecular orbital theory valence Isotopes free valence Nomenclature Free valences Pyrrole free valency Sodium chloride free valencies The Free-Valence Index The Spin-Free Valence Bond Method Applications to Metallic and Electron Rich Systems