Sodium selenide

• Sodium ( I) selenide
• Mono sodium selenide
• Selenium Atrium

Red powder with an unpleasant odor

Fixed

2.625 g · cm -3

875 ° C.

• Decomposes in air containing water
• Insoluble in ammonia

Risk

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Sodium selenide is an inorganic chemical compound from the group of sodium selenide.

Production and representation

Sodium selenide can be obtained by reaction of ammonia with sodium selenium.

When an excess of selenium also arise Natriumdiselenid Na2Se2, Natriumtriselenid Na2Se3, Tetra sodium selenide Na2Se4 and Natriumhexaselenid Na2Se6 representing gray and unstable in moist air solids.

In the reaction of selenium with hydrazine and sodium hydroxide is formed Natriumdiselenid which can be reduced with sodium dithionite, sodium selenide.

Properties

Sodium selenide is a hygroscopic red powder with an unpleasant odor, which decomposes in water.

In pure form, it is white and soluble in water, but dissolves in air under red coloration by selenium deposition and formation of polyselenides. It has a cubic crystal structure ( the anti- calcium fluoride - type) having the space group Fm3m. The compound also four hydrates are known.

With hydrogen chloride it reacts to form hydrogen selenide.

Use

Sodium selenide can be used for organic syntheses.