Arsenide

Arsenide
Identifiers
ChemSpider	10605727 Y
Jmol-3D images	Image 1
SMILES [As-3]
InChI InChI=1S/As/q-3 Y Key: PVBJMPGOALGYQS-UHFFFAOYSA-N Y
Properties
Molecular formula	As3−
Molar mass	74.9216 g mol-1
Exact mass	74.921596417 g mol-1
Related compounds
Other anions	Bismuthide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Arsenide is an arsenic anion with the charge −3. The trianion is formed by the reduction of arsenic by three electrons. For example heating arsenic powder with excess sodium gives sodium arsenide (Na₃As). The anions have no existence in solution since they are extremely basic. These solid salts have very high lattice energies.

An arsenide (compound) is a compound with arsenic in oxidation state −3, but the term is used loosely. The mineral sperrylite (PtAs₂) is called a platinum arsenide, but the formal oxidation state for arsenic is −2. because the solid is usually described as Pt⁴⁺,As₂^4-. The description of gallium arsenide (GaAs) is more straightforward since it features isolated arsenic centers.

Arsenides are toxic because of the inherent toxicity of arsenic and all of its compounds.

Metal arsenides react with acids to form highly toxic arsine gas.

See category for a list.

See also

• Arsenide mineral