Dipotassium nonahydridorhenate (VII)

Crystal structure
	__ K + __ Re 7+ __ H -
General
Surname	Dipotassium nonahydridorhenate (VII)
Ratio formula	K 2 ReH 9
Brief description	white solid
External identifiers / databases
Wikidata	Q1089194
properties
Molar mass	273.4 g mol −1
Physical state	firmly
density	3.07 g cm −3
solubility	soluble in water
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	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 .

{\ displaystyle \ mathrm {Na_ {2} ReH_ {9} + Ba (OH) _ {2} \ longrightarrow BaReH_ {9} +2 \ NaOH}}

{\ displaystyle \ mathrm {BaReH_ {9} + K_ {2} SO_ {4} \ longrightarrow K_ {2} ReH_ {9} + BaSO_ {4}}}

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. Template: room group / 189

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).

[brauer-1] ↑ ^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.

[NV-2] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[3] 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 ).

[von_Christoph_Janiak,_Hans-Jürgen_Meyer,_Dietrich_Gudat,_Ralf_Alsfasser-4] 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-5] 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-6] 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).