Acta Cryst. (2012). E68, m1342-m1343
[ doi:10.1107/S1600536812041724 ]

Tris[4-(dimethylamino)pyridinium][(bis--dichlorido)-decaaquadichloridodineodymium(III)] pentachloride dihydrate

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

Abstract: The title compound, (C₇H₁₁N₂)₃[Nd₂Cl₄(H₂O)₁₀]Cl₅·2H₂O, consists of three 4-(dimethylamino)pyridinium cations, one of which is disordered about an inversion center, one [Nd₂Cl₄(H₂O)₁₀]²⁺ dication possessing inversion symmetry, five chloride anions, one of which is disordered over two inversion centers, and two lattice water molecules. The 4-(dimethylamino)pyridinium cations are protonated at the pyridine N atoms and form N-HCl hydrogen bonds with Cl^- counter-ions. The dimethylamino groups (C/N/C) lie close to the plane of the pyridinium rings, making dihedral angles of 1.6 (6)° and 6.5 (3)°. In the crystal, the [Nd₂Cl₄(H₂O)₁₀]²⁺ dications are linked via O-HO and O-HCl hydrogen bonds, forming sheets lying parallel to the bc plane. These sheets are linked via O-HCl hydrogen bonds, forming a three-dimensional network. The 4-(dimethylamino)pyridinium cations are located in the cavities and linked to the framework by C-HCl interactions.

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