Triphenylarsine


Triphenylarsine is the chemical compound with the formula As3. This organoarsenic compound, often abbreviated AsPh3, is a colorless crystalline solid that is used as a ligand and a reagent in coordination chemistry and organic synthesis. The molecule is pyramidal with As-C distances of 1.942–1.956 Å and C-As-C angles of 99.6–100.5°.
This compound is prepared by the reaction of arsenic trichloride with chlorobenzene using sodium as the reducing agent:

Reactions

Reaction of triphenylarsine with lithium gives lithium diphenylarsenide:
Triphenylarsine is the precursor to tetraphenylarsonium chloride, Cl, a popular precipitating agent.
AsPh3 forms metal complexes with metals. Most are analogues of the corresponding triphenylphosphine derivatives. Examples include IrCl2, RhCl3, and Fe4.