SEARCH Articles Figures Tables Approximate Molecular Orbital Theory for 4-Electron 3-Centre Bonding Units Atomic orbital combinations giving rise to bonding molecular orbitals for methane Bond Orbitals for Atoms Carrying Unshared Electron Pairs Delocalized Molecular Orbital Theory for 4-Electron 3-Centre Bonding Units Methods for Getting Valence Bond Quantities from Molecular Orbital-Based Procedures Molecular Orbitals for n Bonding in AB Molecules Orbitals and Bond Angles for Multiple Bonds Orbitals, for cluster bonding Three-orbital interactions stereoelectronic reasons for the preferred trajectories of intermolecular attack at a chemical bond