Platinum (IV) iodide
Crystal structure | ||||||||||||||||
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__ Pt 4+ __ I - | ||||||||||||||||
General | ||||||||||||||||
Surname | Platinum (IV) iodide | |||||||||||||||
other names |
Platinum tetraiodide |
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Ratio formula | PtI 4 | |||||||||||||||
Brief description |
black solid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 702.70 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
6.06 g cm −3 |
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Melting point |
130 ° C (decomposition) |
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solubility |
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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 . |
Platinum (IV) iodide is an inorganic chemical compound of platinum from the group of iodides .
Extraction and presentation
Platinum (IV) iodide can be obtained by reacting platinum with iodine and potassium iodide or by reacting hexachloridoplatinic acid with hydriodic acid or a sodium iodide solution.
properties
Platinum (IV) iodide is a solid that decomposes in water. It is soluble in ethanol , acetone and liquid ammonia . Three modifications of the compound are known, a less stable, cubic crystallizing form, which forms at low temperature, and two more stable forms, which have an orthorhombic and tetragonal crystal structure . The compound changes into platinum (II, III) iodide Pt 3 I 8 in the open system at around 300 ° C , and in the closed system (own iodine decomposition pressure) into platinum (III) iodide .
Individual evidence
- ↑ a b c d e f g h i data sheet Platin (IV) iodide, Premion®, 99.95% (metals basis), Pt 27.3% min from AlfaAesar, accessed on August 30, 2013 ( PDF )(JavaScript required) .
- ↑ a b Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1715.