Sodium hydroselenide

Sodium hydroselenide is an inorganic compound with the chemical formula NaSeH. 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.

Sodium hydroselenide

Names
IUPAC name Sodium hydroselenide
Other names Sodium biselenide
Identifiers
CAS Number	12195-50-5 Y
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

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

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