Anions

The hydrogen anion is a negative ion of hydrogen, H−.

A carbanion is an anion in which carbon is tervalent (forms three bonds) and bears a formal negative charge in at least one significant mesomeric contributor (resonance form).

In chemistry, a carbide is a compound composed of carbon and a less electronegative element.

Hydroxide is a diatomic anion with chemical formula OH−.

Ozonide is an unstable, reactive polyatomic anion O−3, derived from ozone, or an organic compound similar to organic peroxide formed by a reaction of ozone with an unsaturated compound.

In chemistry, triiodide usually refers to the triiodide ion, I−3.

Ferricyanide is the anion [Fe(CN)6]3−.

Imidazolate (C3H3N−2) is the conjugate base of imidazole.

Bifluoride is an inorganic anion with the chemical formula HF−2 (also written [HF2]−).

In chemistry, the cyclopentadienyl anion or cyclopentadienide is an aromatic species with a formula of [C5H5]− and abbreviated as Cp−.

The telluride ion is the anion Te2− and its derivatives.

Bisulfide (systematically named sulfanide and hydrogen(sulfide)(1−)) is an inorganic anion with the chemical formula HS− (also written as SH−).