Poly[[diaquatris(μ₂-3-methylpyridine-2-carboxylato)(3-methylpyridine-2-carboxylato)sodiumterbium(III)] ethanol monosolvate monohydrate]

Abstract

In the title compound, {[NaTb(C7H6NO2)4(H2O)2]·C2H5OH·H2O}n, the TbIII atom is eight-coordinated in a slightly distorted square-anti­prismatic geometry defined by four carboxyl­ate O atoms and four pyridine N atoms. The bond lengths lie within the range 2.3000 (2)–2.326 (2) Å for the Tb—O bonds and 2.543 (3)–2.553 (3) Å for the Tb—N bonds. The NaI atom is five-coordinated by two water O atoms and three carboxyl­ate O atoms in a distorted square-pyramidal geometry. In the crystal, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional network.

Poly[(μ6-6-oxidopyridinium-2-carboxylato)caesium]

“…For general background to pyridine carboxylic complexes, see: Kang (2011); Lee & Kang (2010); Hong et al (2008). For the Cs-O bond lengths in caesium aryloxide complexes, see: Ungaro et al (1994); Clark et al (1998); Weinert et al (2003).…”

“…Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 2010)'; software used to prepare material for publication: WinGX (Farrugia, 1999). During studies of lanthanide complexes of picolinic acid and their derivatives due to their interesting photoluminescent properties (Kang, 2011;Lee & Kang, 2010;Hong et al, 2008), the title compound was obtained as a side-product.…”