Acta Cryst. (2012). E68, m1388-m1389
[ doi:10.1107/S1600536812043048 ]

4-(Dimethylamino)pyridinium octaaquaerbium(III) tetrachloride monohydrate

M. Benslimane, H. Merazig, J.-C. Daran and O. Zeghouan

Abstract: In the title compound, (C₇H₁₁N₂)[Er(H₂O)₈]Cl₄·H₂O, the asymmetric unit consists of one 4-(dimethylamino)pyridinium and one octaaquaerbium cation balanced by four Cl^- anions, and one water molecule. The 4-(dimethylamino)pyridinium cation is protonated at the pyridine N atom. The dimethylamino group (C/N/C) lies close to the plane of the pyridinium ring, making a dihedral angle of 4.5 (3)°. In the crystal, the [Er(H₂O)₈]³⁺ cations are linked via O-HO and O-HCl hydrogen bonds, forming two-dimensional networks propagating in the ab plane. These networks are linked via O-HO and O-HCl hydrogen bonds, forming a three-dimensional network. The 4-(dimethylamino)pyridinium cations are located in the cavities and are linked to the framework via N-HCl, C-HO and C-HCl hydrogen bonds.

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