Poly[diaqua(μ₂-5-carboxypyridine-3-carboxylato-κ²N:O³)hemi(μ₂-oxalato-κ⁴O¹,O²:O^1′,O^2′)(μ₄-pyridine-3,5-dicarboxylato-κ⁴N:O³:O^3′:O⁵)silver(I)terbium(III)]

Abstract

, the Tb III ion is eight-coordinated by three O atoms from three different pydc (H 2 pydc = pyridine-3,5-dicarboxylic acid) ligands, one O atom from one Hpydc ligand, two O atoms from one oxalate ligand and two water molecules in a distorted square-antiprismatic geometry. The Ag I ion is coordinated in an almost linear fashion by two pyridyl N atoms from one pydc and one Hpydc ligand and has weak interactions with two carboxylate O atoms. The carboxylate groups of pydc and Hpydc ligands link Tb centers, forming a one-dimensional chain. The oxalate adopts a tetradentate bis-chelating coordination mode, connecting the chains into a two-dimensional layer. These layers are further assembled via [Ag(pydc)(Hpydc)] pillars and O-HÁ Á ÁO and C-HÁ Á ÁO hydrogen bonds into a three-dimensional coordination framework. Related literature

Poly[triaquatris(μ4-pyridine-3,5-dicarboxylato)dicerium(III)]

“…3,5-PydH 2 can be easily deprotonated to get a O-donors to N-donor multidentate anion (pyd 2-), enabling the ligand to act as a bridge to 3 d and/or 4f metal ions (Jia et al, 2006). Some examples of coordination polymer with 3,5-pydH 2 have been reported (Guo et al, 2009;Li, 2007;Yi et al, 2009).…”