Poly[aqua(μ(3)-5-aza-niumylisophthalato)-(μ-oxalato)neodymium(III)]

Abstract

The title compound, [Nd(C(8)H(6)NO(4))(C(2)O(4))(H(2)O)](n), is a layer-like coordination polymer. The Nd(III) ion is coordinated by four carboxyl-ate O atoms from three bridging 5-aza-nium-yl-isophthalate (Haip) ligands, four carboxyl-ate O atoms from two oxalate (ox) anions and one ligated water mol-ecule in a tricapped trigonal-prismatic geometry. The Haip anion acts as a μ(3)-bridge, connecting three Nd(III) ions through two carboxyl-ate groups; the ox anion adopts a bis-bidentate-bridging mode, linking two Nd(III) ions. The layer framework is further extended to a three-dimensional supra-molecular structure through N-H⋯O and O-H⋯O hydrogen bonds.

Fig. 1.

A fragment of the polymeric structure, with displacement ellipsoids drawn at the 30% probability level. [Symmetry codes: (i) -x, 1 - y, -z; (ii) x, -1 + y, z; (iii) 1/2 - x, 1/2 + y, 1/2 - z].

Fig. 2.

Geometry of the nine-coordinated NdIII ion in the title compound.

Fig. 3.

A packing diagram of the title compound, showing a layer-like structure in the ab plane.

Fig. 4.

. A packing diagram, showing a three-dimensional supramolecular network driven by hydrogen bonds (dashed lines).