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Selenide
Introduction
The selenide ion is Se2−.
A selenide is a chemical compound in which selenium serves as an anion with oxidation number of −2, much as sulfur does in a sulfide.
Discussion
Discussion
The chemistry of the selenides parallels that of the sulfides.
Similar to sulfide, for an aqueous solution, selenide ion, Se2−, is prevalent only in very basic conditions. In neutral conditions, hydrogen selenide ion, HSe−, is most common. In acid conditions, hydrogen selenide, H2Se, is formed.