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