Dipotassium nonahydridorhenate (VII)
Crystal structure | |||||||
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__ K + __ Re 7+ __ H - | |||||||
General | |||||||
Surname | Dipotassium nonahydridorhenate (VII) | ||||||
Ratio formula | K 2 ReH 9 | ||||||
Brief description |
white solid |
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External identifiers / databases | |||||||
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properties | |||||||
Molar mass | 273.4 g mol −1 | ||||||
Physical state |
firmly |
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density |
3.07 g cm −3 |
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solubility |
soluble in water |
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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 . |
Dipotassium nonahydridorhenate (VII) is an inorganic chemical compound belonging to the rhenate group .
Extraction and presentation
Dipotassium nonahydridorhenate (VII) can be obtained by a two-step reaction. First, disodium nonahydridorhenate (VII) is reacted with barium hydroxide and the resulting intermediate is reacted with a mixture of potassium sulfate and potassium hydroxide .
properties
Dipotassium nonahydridorhenate (VII) is a diamagnetic white powder that is soluble in water and is stabilized by alkali. It is sparingly soluble in methanol . In normal humid air it is unstable with the formation of perrhenate and carbonate . It has a hexagonal crystal structure with the space group P 6 2 m (space group no. 189) and the lattice parameters a = 960.7 pm and c = 550.8 pm. The hydrogen-rich compounds K 2 ReH 9 , BaReH 9 and K 2 TcH 9 contain complex anions, the metal atoms of which are located in triple-roofed trigonal prisms made of hydrogen atoms. Dipotassium nonahydridorhenate (VII) was discovered as the first complex transition metal hydride compound in the 1960s.
Individual evidence
- ↑ a b c d e f 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. 1624.
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ^ W. Bronger, L. à Brassard, P. Müller, B. Lebech, Th. Schultz, K 2 ReH 9 , a redefinition of the structure , Journal for Inorganic and General Chemistry, June 21, 1999, Volume 625, Issue 7, Pp. 1143-1146 ( doi : 10.1002 / (SICI) 1521-3749 (199907) 625: 7 <1143 :: AID-ZAAC1143> 3.0.CO; 2-V ).
- ^ Christoph Janiak, Hans-Jürgen Meyer, Dietrich Gudat, Ralf Alsfasser: Riedel Modern Inorganic Chemistry . Walter de Gruyter, 2012, ISBN 3-11-024901-4 , p. 274 ( limited preview in Google Book search).
- ↑ Michael Hirscher: Handbook of Hydrogen Storage . John Wiley & Sons, 2010, ISBN 3-527-62981-5 , pp. 149 ( limited preview in Google Book search).
- ↑ Richard Earl Dickerson, Hans-Werner Sichting: Principles of Chemistry . Walter de Gruyter, 1988, ISBN 3-11-009969-1 , p. 50 ( limited preview in Google Book search).