Memanti­nium chloride 0.1-hydrate

The crystal structure of the title compound, C(12)H(22)N(+)·Cl(−)·0.1H(2)O, consists of (3,5-dimethyl-1-adamantyl)ammonium chloride (memanti­nium chloride) and uncoordinated water mol­ecules. The four six-membered rings of the memanti­nium cation assume typical chair conformations. The Cl(−) counter-anion links with the memanti­nium cation via N—H⋯Cl hydrogen bonding, forming channels where the disordered crystal water molecules are located. The O atom of the water mol­ecule is located on a threefold rotation axis, its two H atoms symmetrically distributed over six sites; the water mol­ecule links with the Cl(−) anions via O—H⋯Cl hydrogen bonding.