Memantinium chloride 0.1-hydrate

Abstract

The crystal structure of the title compound, C12H 22N+·Cl-·0.1H2O, consists of (3,5-dimethyl-1-adamantyl)ammonium chloride (memanti-nium chloride) and uncoordinated water molecules. The four six-membered rings of the memanti-nium cation assume typical chair conformations. The Cl- counter-anion links with the memanti-nium cation via N - H⋯Cl hydrogen bonding, forming channels where the disordered crystal water molecules are located. The O atom of the water mol-ecule is located on a threefold rotation axis, its two H atoms symmetrically distributed over six sites; the water mol-ecule links with the Cl- anions via O - H⋯Cl hydrogen bonding. © Lou et al. 2009.