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| Identifiers | |
|---|---|
| |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.151.507 |
| EC Number |
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| |
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| Properties | |
| DyI2 | |
| Molar mass | 416.309 g·mol−1 |
| Appearance | dark purple-black solid[1] |
| Melting point | 659 °C[1] |
| Hazards | |
| GHS labelling:[2] | |
 | |
| Warning | |
| H315,H319,H335 | |
| P261,P264,P264+P265,P271,P280,P302+P352,P304+P340,P305+P351+P338,P319,P321,P332+P317,P337+P317,P362+P364,P403+P233,P405,P501 | |
| Related compounds | |
Otheranions | dysprosium(II) chloride dysprosium(II) bromide |
Related compounds | dysprosium(III) iodide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Dysprosium(II) iodide is aniodide ofdysprosium with thechemical formula DyI2.
Dysprosium(II) iodide can be produced by reducingdysprosium(III) iodide with metallicdysprosium under a vacuum at 800 to 900 °C:[1]
It can also be formed by the reaction of dysprosium andmercury(II) iodide:[1]
It can also be formed by the direct reaction of dysprosium andiodine.[3]
Dysprosium(II) iodide is a dark purple-black solid that is easilydeliquescent and can only be stored in a dry inert gas or a vacuum. In the air, it will absorb moisture and become a hydrate, but they are unstable and will quickly convert into iodide oxides and releasehydrogen gas. This process occurs faster in the presence ofwater. This compound has the same crystal structure ascadmium chloride.[1] It can form complexes withtetrahydrofuran,butanol andphenol.[3]
The reaction between dysprosium(II) iodide andsilicon tetrachloride producestrichlorosilyl radicals, which can catalyze the trimerization ofalkynes.[4][5]
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