Dysprosium (II) iodide
Crystal structure | ||||||||||||||||
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__ Dy 2+ __ I - | ||||||||||||||||
General | ||||||||||||||||
Surname | Dysprosium (II) iodide | |||||||||||||||
other names |
Dysprosium diiodide |
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Ratio formula | DyI 2 | |||||||||||||||
Brief description |
dark purple to black solid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 416.31 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
659 ° C |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Dysprosium (II) iodide is an inorganic chemical compound of dysprosium from the group of iodides .
Extraction and presentation
Dysprosium (II) iodide can be obtained by reducing dysprosium (III) iodide with dysprosium in a vacuum at 800 to 900 ° C.
It is also possible to display it by reacting dysprosium with mercury (II) iodide .
Direct representation from iodine and dysprosium is also possible.
properties
Dysprosium (II) iodide is a dark purple to black solid. The connection is extremely hygroscopic and can only be stored and handled under carefully dried protective gas or in a high vacuum. In air it changes into hydrates with moisture absorption , but these are unstable and more or less quickly transform into oxide iodides with the evolution of hydrogen. These processes take place much faster with water. The compound has a crystal structure of the cadmium chloride type. The compound reacts with organic compounds such as tetrahydrofuran , butanol or phenol to form complex compounds.
use
Dysprosium (II) iodide is used to produce trichlorosilyl radicals from silicon chloride to catalyze the cyclotrimerization of alkynes to substituted benzenes .
Individual evidence
- ↑ a b c d e Georg Brauer , with the collaboration of Marianne Baudler u. a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1081 .
- ↑ a b c d data sheet Dysprosium (II) iodide, anhydrous, powder, ≥99.9% trace metals basis from Sigma-Aldrich , accessed on May 2, 2014 ( PDF ).
- ^ A b Karl A. Jr. Gschneidner, Jean-Claude Bunzli, Vitalij K. Pecharsky: Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2009, ISBN 0-08-093257-6 , pp. 247 ( limited preview in Google Book search).
- ^ Z. Zhu, C. Wang, X. Xiang, C. Pi, X. Zhou: DyI2 initiated mild and highly selective silyl radical-catalyzed cyclotrimerization of terminal alkynes and polymerization of MMA. In: Chem. Commun. (Camb.). 2006, pp. 2066-2068, PMID 16767277 .