what kinds of bonds are metals and ligands
Symmetry arguments suggest that most ligands engage metals via multiple bonds. The term 'metal ligand multiple bond is often reserved for ligands of the type CR n and NR n (n = 0, 1, 2) and OR n (n = 0, 1) where R is H or an organic substituent, or pseudohalide.s a cautionary note, the classification of a metal ligand bond as being multiple bond order is ambiguous and even arbitrary because bond order is a formalism.