SALC d-d Orbital Overlap

These diagrams show the origin of σ π and δ bonding between two d orbitals aligned along the z axis.

d_z² is capable of forming a σ interaction with another d_z²

Both d_xz and d_yz can form π bonds with each other.

d_x²_-y² and d_xy can interact with each other to form δ bonds.

s orbital overlap