bonding molecular orbital
The @M03996@ whose occupation by electrons increases the total bonding (usually, lowers the total energy) of a molecule. Generally, the energy level of a bonding MO lies lower than the average of the @V06588@ orbitals of the atoms constituting the molecule.
PAC, 1999, 71, 1919. (Glossary of terms used in theoretical organic chemistry) on page 1929 [Terms] [Paper]