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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zehnder, Ralph A. Fontaine, Nick C. Zeller, Matthias Renn, Robert A. |
| Description | Country affiliation: United States Author Affiliation: Zehnder RA ( Department of Chemistry, University of Louisiana at Monroe, Monroe, LA 71209, USA. zehnder@ulm.edu) |
| Abstract | The title compound, [Nd $_{2}(C$ $_{5}H$ $_{6}O$ $_{4})$ $_{2}(C$ $_{8}H$ $_{4}O$ $_{4})(H$ $_{2}O)$ $_{4}]·17H$ $_{2}O,$ obtained via hydrothermal reaction of Nd $_{2}O$ $_{3}$ with glutaric acid and terephthalic acid, assembles as a three-dimensional open framework with ten-coordinate Nd-O polyhedra. The asymmetric part of the unit cell contains half a glutarate anion, a quarter of a terephthalate dianion, half an Nd $^{III}$ cation, one coordinated water molecule and 4.25 solvent water molecules. Each [NdO $_{10}]$ coordination polyhedron is comprised of six O atoms originating from four glutarate anions, two others from a terephthalate carboxylate group, which coordinates in a bidentate fashion, and two from water molecules. The Nd-O distances range from 2.4184 (18) to 2.7463 (18) Å. The coordination polyhedra are interconnected by the glutarate anions, extending as a two-dimensional layer throughout the bc plane. Individual two-dimensional layers are interlinked via terephthalate anions along the a axis. This arrangement results in rectangular-shaped cavities with interstices of approximately 3.5 × 6 × 6.5 Å (approximately 140 Å $^{3}),$ which are occupied by water molecules. The Nd $^{III}$ cations, terephthalate anions, glutarate anions and one of the interstitial water molecules are located on special crystallographic positions. The Nd-terephthalate-Nd units are located across twofold rotation axes parallel to [100], with the Nd $^{III}$ cations located directly on these axes. In addition, the terephthalate anion is bisected by a crystallographic mirror plane perpendicular to that axis, thus creating an inversion centre in the middle of the aromatic ring. The glutarate ligand is bisected by a crystallographic mirror plane perpendicular to (001). One of the solvent water molecules lies on a site of 2/ m symmetry, and the symmetry-imposed disorder of its H atoms extends to the H atoms of the other four solvent water molecules, which are disordered over two equally occupied and mutually exclusive sets of positions. |
| File Format | HTM / HTML |
| e-ISSN | 20532296 |
| Journal | Acta Crystallographica Section C Crystal Structure Communications |
| Issue Number | Pt 12 |
| Volume Number | 66 |
| Language | English |
| Publisher | IUCr/Wiley |
| Publisher Date | 2010-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Analytical Chemistry Discipline Crystallography Glutarates Chemistry Neodymium Organometallic Compounds Phthalic Acids Crystallography, X-ray Hydrogen Bonding Ligands Molecular Structure Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
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