An ammine complex or metal ammine complex is a type of chemical compound. It is a coordination complex where one or more ammine ligands are connected to a central metal atom.
The ammine ligand :NH3 is a molecule of ammonia. This is a different spelling from amine, the functional group in organic chemistry. The different spelling shows that it is acting as a ligand, like how a water ligand is called "aquo" or "aqua".
Ammine complexes are some of the first coordination complexes studied by chemists. Alfred Werner, the first inorganic chemist to win the Nobel Prize in Chemistry, made his theory of coordination chemistry by studying ammines. Werner's idea of "primary" and "secondary" bonding in hexaamminecobalt(III) chloride inspired Gilbert N. Lewis to develop the modern theory of chemical bonds.
