electrons are donated from the ligand to an empty orbital on MO of Coordination Complexes The coordination complex is formed from dative bonds where the metal. In an octahedral complex, there are M-L sigma bonds M-L sigma" bonds The orbitals that form the M-L sigma bonds and sigma" bonds are: non bonding orbitals and all lived orbitals from the metai 6 orbitals containing lone pairs on the ligands 6 orbitals containing lone pairs on the ligands combining with 1 , 3p and 2 d orbitals from the metal 6 orbitals from the ligands and 5 d orbitals on the metal