Poly[[di-μ(3)-nicotinato-hemi-μ(4)-oxalato-hemi-μ(2)-oxalato-neodymium(III)silver(I)] dihydrate]

Abstract

The asymmetric unit of the title compound, {[AgNd(C(6)H(4)NO(2))(2)(C(2)O(4))]·2H(2)O}(n), contains one Nd(III) atom, one Ag(I) atom, one oxalate ligand, two nicotinate ligands and two uncoordinated water mol-ecules. The Nd(III) atom is eight-coordinated in a distorted square-anti-prismatic coordination geometry by four O atoms from two oxalate ligands and four O atoms from four nicotinate ligands. The Ag(I) atom has a T-shaped configuration, defined by two N atoms from two nicotinate ligands and one O atom from one oxalate ligand. The nicotinate and oxalate ligands link the Nd and Ag atoms into a three-dimensional coordination framework. O-H⋯O and O-H⋯N hydrogen bonds donated by water mol-ecules are observed in the crystal.

Fig. 1.

The asymmetric unit of the title compound, together with symmetry-related atoms to complete the coordination units. Displacement ellipsoids are drawn at the 50% probability level. [Symmetry codes: (i) -x+1, -y, -z+1; (ii) -x, y-1/2, -z+1/2; (iii) x, -y+1/2, z+1/2; (iv) -x, -y, -z+1; (v) -x, -y, -z.]

Fig. 2.

View of the structure along the a axis. Dashed lines denote hydrogen bonds.