Dipolar Bond

A dipolar bond, also known as a dative covalent bond or coordinate bond is a kind of 2-center, 2-electron covalent bond in which the two electrons derive from the same atom. Typically, a dipolar bond is formed when a Lewis base donates a pair of electrons to a Lewis acid. This description of bonding is a characteristic of valence bond theory. It has no place in molecular orbital theory or ligand field theory of coordination complexes.