Catena-Poly[[[diaqua-thulium(III)] - 6-carboxy-nicotinato - pyridine-2,5-di-carboxyl-ato] dihydrate]

Abstract

The title compound, {[Tm(C7H3NO4)(C 7H4NO4)(H2O)2] ·2H2O} n , is isotypic with the analogous TbIII compound [Li et al. (2009). Acta Cryst. E65, m410]. All interatomic distances and angles and the hydrogen-bond geometries are very similar for the two structures. The refined Flack parameter of 0.49 (2) suggests inversion twinning. © 2009.