Pi backbonding
= Pi backbonding
{wiki=Pi_backbonding}
Pi backbonding, often referred to in the context of chemistry, particularly in coordination chemistry and organometallic chemistry, is a type of bonding interaction between a metal center and a ligand. It typically involves the donation of electron density from a filled metal d-orbital to an empty orbital of a ligand, usually a π* (pi-star) orbital, which is the antibonding orbital associated with pi bonds.