Illustrated Glossary of Organic Chemistry

Bonding molecular orbital (bonding orbital): A molecular orbital formed by in-phase overlap of atomic orbitals. A bonding molecular orbital is lower in energy than the atomic orbitals from which it is formed.



Hydrogen 1s atomic orbital
Hydrogen 1s atomic orbital
H2 σ bonding molecular orbital
Two hydrogen 1s atomic orbitals overlap in phase to form the egg-shaped H2 σ bonding molecular orbital.