Acta Cryst. (2009). E65, o2191  [ doi:10.1107/S1600536809031791 ]

Memantinium chloride 0.1-hydrate

W.-J. Lou, X.-R. Hu and J.-M. Gu

Abstract: The crystal structure of the title compound, C₁₂H₂₂N⁺·Cl^-·0.1H₂O, 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-HCl 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-HCl hydrogen bonding.

Online 19 August 2009

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