catena-Poly[1-butyl-3-methyl­imidazolium [[dichlorido(methanol-κO)(propan-2-ol-κO)lanthanate(III)]-di-μ-chlorido]]

The title compound, (C₈H₁₅N₂)[LaCl₄(CH₃OH)(C₃H₇OH)], consists of one 1-butyl-3-methyl­imidazolium (BMI⁺) cation and one hexa­hedral tetra­chlorido(methanol)(propan-2-ol)lanthanate anion. The La^III ion is eight-coordinate, with the La^III ion bridged by a pair of Cl atoms, so forming chains propagating along the a-axis direction. Each La^III ion is further coordinated by two isolated Cl atoms, one methanol and one propan-2-ol mol­ecule. The coordinated methanol and propan-2-ol mol­ecules of the anion form O—H...Cl hydrogen bonds with the Cl atoms of inversion-related anions. The BMI⁺ cation froms C—H...Cl hydrogen bonds with the Cl atoms of the anion. The anions are located in the C faces of the triclinic unit cell, with an inversion center in the middle of the La₂Cl₂ ring of the polymeric chain.