Caesium hydride

Caesium hydride
	; Caesium cation, Cs+ Hydrogen anion, H−
Names
	IUPAC name Caesium hydride
	Other names Cesium hydride
Identifiers
CAS Number	13772-47-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	122830 ;
PubChem CID	139281;
CompTox Dashboard (EPA)	DTXSID10276375 ;
	InChI InChI=1S/Cs.H/q+1;-1 Key: HXCOCQWMKNUQSA-UHFFFAOYSA-N ; InChI=1S/Cs.H/q+1;-1 Key: HXCOCQWMKNUQSA-UHFFFAOYSA-N;
	SMILES [H-].[Cs+];
Properties
Chemical formula	CsH
Molar mass	133.91339 g/mol
Appearance	White or colorless crystals or powder
Density	3.42 g/cm3
Melting point	~170 °C (decomposes)
Structure
Crystal structure	Face centered cubic
Coordination geometry	Octahedral
Related compounds
Other anions	CsF; CsCl; CsBr; CsI;
Other cations	LiH; NaH; KH; RbH; Hydrides;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Caesium hydride or cesium hydride is an inorganic compound of caesium and hydrogen with the chemical formula Cs H. It is an alkali metal hydride. It was the first substance to be created by light-induced particle formation in metal vapor, and showed promise in early studies of an ion propulsion system using caesium. It is the most reactive stable alkaline metal hydride of all. It is a powerful superbase and reacts with water extremely vigorously.

The caesium nuclei in CsH can be hyperpolarized through interactions with an optically pumped caesium vapor in a process known as spin-exchange optical pumping (SEOP). SEOP can increase the nuclear magnetic resonance (NMR) signal of caesium nuclei by an order of magnitude.

It is very difficult to make caesium hydride in a pure form. Caesium hydride can be produced by heating caesium carbonate and metallic magnesium in hydrogen at 580 to 620 °C.

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