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Crystal structure of hexakis(urea-κO)chromium(III) dichromate bromide monohydrate from synchrotron X-ray data
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| Zeitschriftentitel: | Acta Crystallographica Section E Crystallographic Communications |
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| Personen und Körperschaften: | , , , |
| In: | Acta Crystallographica Section E Crystallographic Communications, 71, 2015, 11, S. 1336-1339 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
International Union of Crystallography (IUCr)
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| Schlagwörter: |
| Zusammenfassung: | <jats:p>The title bromide salt, [Cr{CO(NH<jats:sub>2</jats:sub>)<jats:sub>2</jats:sub>}<jats:sub>6</jats:sub>](Cr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub>)Br·H<jats:sub>2</jats:sub>O, is isotypic to the corresponding chloride salt. Within the complex cation, the Cr<jats:sup>III</jats:sup>atom is coordinated by six O atoms of six urea ligands, displaying a slightly distorted octahedral coordination environment. The Cr—O bond lengths involving the urea ligands are in the range 1.9534 (13)–1.9776 (12) Å. The Cr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub><jats:sup>2−</jats:sup>anion has a nearly staggered conformation, with a bridging angle of 130.26 (10)°. The individual components are arranged in rows extending parallel to [100]. The Br<jats:sup>−</jats:sup>anion links the complex cation, as well as the solvent water molecule, through N—H...Br and O—H...Br hydrogen-bonding interactions. The supramolecular architecture also includes N—H...O and O—H...O hydrogen bonding between urea N—H and water O—H donor groups and the O atoms of the Cr<jats:sub>2</jats:sub>O<jats:sub>7</jats:sub><jats:sup>2−</jats:sup>anion as acceptor atoms, leading to a three-dimensional network structure.</jats:p> |
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| Umfang: | 1336-1339 |
| ISSN: |
2056-9890
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| DOI: | 10.1107/s2056989015019258 |