Potassium amide

Structural formula
General
Surname	Potassium amide
Molecular formula	KNH 2
Brief description	white to gray powder with a smell of ammonia
External identifiers / databases
EC number	241-275-9
ECHA InfoCard	100.037.508
PubChem	87015
Wikidata	Q409505
properties
Molar mass	55.12 g mol −1
Physical state	firmly
density	1.57 g cm −3
Melting point	338 ° C
solubility	reacts with 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 .

Potassium amide is a chemical compound from the group of amides .

Extraction and presentation

Potassium amide can be obtained by reacting potassium with ammonia .

{\ displaystyle \ mathrm {2 \ K + 2 \ NH_ {3} {\ xrightarrow {65-105 ^ {o} C}} 2 \ KNH_ {2} + \ H_ {2}}}

It was first depicted in 1808 by Joseph Louis Gay-Lussac and Louis Jacques Thénard .

properties

Potassium amide is a white to gray hygroscopic powder with an ammonia odor that reacts with water. It has a monoclinic crystal structure with the space group P 2 ₁ / m (space group no. 11) . It decomposes in moist air, forming ammonia and potassium hydroxide . Template: room group / 11

use

Potassium amide is used in organic chemistry (e.g. for nucleophilic substitutions and polymerizations ).

Individual evidence

↑ ^a ^b ^c Alkalimetals: MSDS ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 27 kB) @1@ 2

↑ ^a ^b ^c ^d Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . 2007, ISBN 978-3-540-60035-0 , pp. 510 ( limited preview in Google Book Search).

↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

^ R. Abegg, F. Auerbach: 'Handbuch der inorganic Chemie'. Verlag S. Hirzel, Vol. 2, 1908. P. 368. Full text

↑ Saxon Academy of Sciences: Chronology of the natural sciences . 2002, ISBN 978-3-8171-1610-2 , pp. 364 ( limited preview in Google Book search).

↑ R. Juza, H. Jacobs, W. Klose: The crystal structures of the low-temperature modifications of potassium and rubidium amide . In: Journal of Inorganic and General Chemistry . 338, 1965, pp. 171-178. doi : 10.1002 / zaac.19653380309 .

^ Karl-Heinz Lautenschläger, Werner Schröter, Andrea Wanninger: Taschenbuch der Chemie . 2007, ISBN 978-3-8171-1760-4 , pp. 286 ( limited preview in Google Book search).

[alkalimetals-1] Alkalimetals: MSDS ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 27 kB) @1@ 2

[Lax-2] Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . 2007, ISBN 978-3-540-60035-0 , pp. 510 ( limited preview in Google Book Search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Abegg-4] R. Abegg, F. Auerbach: 'Handbuch der inorganic Chemie'. Verlag S. Hirzel, Vol. 2, 1908. P. 368. Full text

[Chronologie-5] Saxon Academy of Sciences: Chronology of the natural sciences . 2002, ISBN 978-3-8171-1610-2 , pp. 364 ( limited preview in Google Book search).

[6] R. Juza, H. Jacobs, W. Klose: The crystal structures of the low-temperature modifications of potassium and rubidium amide . In: Journal of Inorganic and General Chemistry . 338, 1965, pp. 171-178. doi : 10.1002 / zaac.19653380309 .

[buch-7] Karl-Heinz Lautenschläger, Werner Schröter, Andrea Wanninger: Taschenbuch der Chemie . 2007, ISBN 978-3-8171-1760-4 , pp. 286 ( limited preview in Google Book search).