Copper hydride

Crystal structure
__ Cu +      __ H -
General
Surname	Copper hydride
other names	Copper monohydride Copper (I) hydride
Ratio formula	CuH
Brief description	red-brown solid
External identifiers / databases
CAS number 13517-00-5 EC number 803-023-1 ECHA InfoCard 100.229.864 PubChem 3335333 Wikidata Q133761
properties
Molar mass	64.55 g mol −1
Physical state	firmly
density	6.38 g cm −3
safety instructions
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 .

Copper hydride is an inorganic chemical compound of copper from the group of hydrides .

Extraction and presentation

Copper hydride can be obtained by reacting copper iodide with lithium aluminum hydride in pyridine .

${\displaystyle \mathrm {4\ CuI+LiAlH_{4}\longrightarrow LiI+AlI_{3}+4\ CuH} }$

It is also possible to prepare pure copper hydride by reacting copper (I) bromide with diisobutylaluminum hydride in pyridine. Copper sulfate is reduced to copper hydride by phosphinic acid .

properties

Copper hydride is a light red-brown powder that is flammable in air. It is resistant up to about 60 ° C, above this temperature (from 110 ° C explosively) it decomposes into the elements. It is soluble in pyridine with a dark red color. It crystallizes in a crystal structure of the wurtzite type with the space group P 6 ₃ mc (space group no. 186) , a = 2.89 Å, c = 4.63 Å. The enthalpy of formation is 21.3 kJ / mol. In addition to a dimer, the compound can also form a polymer via relatively strong hydrogen bonds.

use

Copper hydride is used as a reagent for the stereoselective synthesis of exocyclic tetrasubstituted enol ethers and olefins .

Individual evidence

1. ↑ ^{a b c d e} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 971.
2. ^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer, 1998, ISBN 3-642-58842-5 , pp. 428 ( limited preview in Google Book search).
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.
4. ^ ^{A b} A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 288.
5. ↑ Data sheet Copper hydride (CuH) solution, in toluene from Sigma-Aldrich , accessed on April 1, 2013 ( PDF ).