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Sodium hydroselenide
Names
	IUPAC name Sodium hydroselenide
	Other names Sodium biselenide
Identifiers
CAS Number	12195-50-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	67024398;
PubChem CID	129628184;
	InChI InChI=1S/Na.H2Se/h;1H2/q+1;/p-1 Key: RBRLCUAPGJEAOP-UHFFFAOYSA-M;
	SMILES [Na+].[SeH-];
Properties
Chemical formula	NaSeH
Molar mass	102.969 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Sodium hydroselenide is an inorganic compound with the chemical formula Na Se H. It is a salt of hydrogen selenide. It consist of sodium cations Na⁺ and hydroselenide anions ⁻SeH. Each unit consists of one sodium, one selenium, and one hydrogen atom. Sodium hydroselenide is a selenium analog of sodium hydroxide NaOH.

Production

Sodium hydroselenide can be made by reducing selenium with sodium borohydride:

Se + Na[BH₄] → NaSeH + BH₃ (g)

Alternatively it can be made from sodium ethoxide exposed to hydrogen selenide:^[1]

CH₃CH₂O⁻Na⁺ + H₂Se → NaSeH + CH₃CH₂OH

Sodium hydroselenide is not made for storage, instead it is used immediately after production in a fume hood thanks to the appalling odour of hydrogen selenide.

Properties

Sodium hydroselenide dissolves in water or ethanol. In humid air sodium hydroselenide is changed to sodium polyselenide and elemental selenium.^[1]

Sodium hydroselenide is slightly reducing.^[1]

Use

In organic synthesis, hydrogen sodium hydroselenide is a nucleophillic agent for insertion of selenium.^[1]

References

^ ^a ^b ^c ^d Młochowski, Jacek; Syper, Ludwik (2001). "Sodium Hydrogen Selenide". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rs079. ISBN 0471936235.