Poly[[pentaaqua(μ4-pyridine-2,4,6-tricarboxylato)(μ3-pyridine-2,4,6-tricarboxylato)diterbium(III)] monohydrate

Xiao-Ke Yu,Hong-Lin Zhu

doi:10.1107/s1600536812032898

Abstract

The three-dimensional title coordination polymer, {[Tb2(C8H2NO6)2(H2O)5]·H2O}n, was hydrothermally synthesized by reacting the corresponding rare-earth salt with pyridine-2,4,6-tricarboxylic acid (H3ptc). There are two independent TbIII atoms in the structure, one of which is nine-coordinated, forming a monocapped NO8 square-antiprism and the other is eight-coordinated exhibiting a 4,4-bicapped NO7 trigonal–prismatic environment. The complex units are interconnected through the ptc3− anions acting in different coordination modes, resulting in a three-dimensional coordination polymer. The crystal structure features extensive O—H⋯O hydrogen bonds.

Highlights

{[Tb2(C8H2NO6)2(H2O)5]H2O}n, was hydrothermally synthesized by reacting the corresponding rare-earth salt with pyridine-2,4,6-tricarboxylic acid (H3ptc)
The complex units are interconnected through the ptc3 anions acting in different coordination modes, resulting in a three-dimensional coordination polymer
Symmetry codes: (i) −x+1/2, y−1/2, −z+1/2; (iii) −x+1, −y+1, −z+1; (iv) −x+1/2, y−1/2, −z+3/2; (viii) −x+1, −y, −z+1; (ix) x, y+1, z; (x) −x+1, −y, −z+2;