Polymeric aqua(glutarato)(hydrogen glutarato)lanthanum(III) monohydrate

Abstract

The structure of the title compound, [La(C5H6O4)(C5H7O4)-(H2O)]·H2O, consists of dense layers formed by chains of one-edge-sharing LaO9(H2O) polyhedra, linked together by the glutarate ligand. The three-dimensional polymeric structure, built up through connection of these layers by the hydrogen glutarate ligand, exhibits cavities accommodating a guest water mol­ecule. The lanthanum ion is tenfold coordinated by four glutarates, acting as bridging–chelating carboxyl­ate groups, by three hydrogen glutarates, three times monodentate, and by one water mol­ecule. Its coordination polyhedron is highly distorted and intermediate between a bicapped dodecahedron and a tetracapped trigonal prism. Hydro­gen bonding links the two water mol­ecules and the framework built up from this polynuclear coordination polymer. A very short hydrogen bond, D⋯A = 2.484 (3) Å, links the proton­ated with the deprotonated acid groups in the hydrogen glutarate.