Cargando…
Poly[[dodecaaquabis(μ(3)-pyridine-2,6-dicarboxylato)tetrakis(μ(2)-pyridine-2,6-dicarboxylato)tricalciumdieuropium(III)] 10.5-hydrate]
In the title compound, {[Ca(3)Eu(2)(C(7)H(3)NO(4))(6)(H(2)O)(12)]·10.5H(2)O}(n), the Eu(III) ion is nine-coordinated by three tridentate pyridine-2,6-dicarboxylate (PDA) ligands, forming a [Eu(PDA)(3)](3−) building block. The Ca(2+) ions adopt two types of coordination geometries. One Ca(2+) ion, l...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2012
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344405/ https://www.ncbi.nlm.nih.gov/pubmed/22590167 http://dx.doi.org/10.1107/S1600536812018028 |
Sumario: | In the title compound, {[Ca(3)Eu(2)(C(7)H(3)NO(4))(6)(H(2)O)(12)]·10.5H(2)O}(n), the Eu(III) ion is nine-coordinated by three tridentate pyridine-2,6-dicarboxylate (PDA) ligands, forming a [Eu(PDA)(3)](3−) building block. The Ca(2+) ions adopt two types of coordination geometries. One Ca(2+) ion, lying on a twofold rotation axis, is eight-coordinated by four carboxylate O atoms from four PDA ligands and four water molecules, and the other two Ca(2+) ions, each lying on an inversion center, are six-coordinated by two carboxylate O atoms from two PDA ligands and four water molecules. The carboxylate groups bridge the Eu(III) and Ca(2+) ions into a three-dimensional porous framework, with channels extending along [010] and [001] in which lattice water molecules are located. Two of the lattice water molecules are disordered over two sets of sites with equal occupancy and one water molecule is 0.25-occupied. Numerous O—H⋯O hydrogen bonds involving the water molecules and carboxylate O atoms are present. |
---|