SALC – Octahedral Complex

This series of diagrams illustrate the symmetry adapted linear combinations of ligand σ orbitals, which are represented by spheres.

The metal s orbital has a_1g symmetry as it is symmetric to all operations. Hence it bonds with all the ligand σ orbitals in phase.

The p orbitals have t_1u symmetry. The linear nature of p orbitals mean they only bond when pointing directly at ligand σ orbitals.

The d orbitals which have e_g symmetry bond with ligand σ orbitals as they point directly at them.

The d orbitals which have t_2g symmetry are non-bonding with ligand σ orbitals, as the ligand σ orbitals see equal amounts of in phase and out of phase orbital, hence a net zero interaction.

Orbital-orbital overlap and SALC Homepage