The arsonium cation is a positively charged polyatomic ion with the chemical formula AsH+
4
. An arsonium salt is a salt containing either the arsonium (AsH+
4
) cation, such as arsonium bromide (AsH+
4
Br
) and arsonium iodide (AsH+
4
I
), which can be synthesized by reacting arsine with hydrogen bromide or hydrogen iodide.[1]. Or more commonly, as organic derivative such as the quaternary arsonium salts Ph
4
As+
Cl
(CAS: [123334-18-9], hydrate form) and the zwitterionic compound arsenobetaine.

Arsonium
Ball-and-stick model version of the arsonium ion
Names
Systematic IUPAC name
Arsonium
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
322800
Properties
AsH+
4
Molar mass 78.954 g·mol−1
Conjugate base Arsine
Structure
Tetrahedral
Related compounds
Related compounds
ammonium
phosphonium
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Structure of quaternary arsonium compound arsenobetaine.

ReferencesEdit

  1. ^ Muñoz‐Hernández, M. Á. (2006). Arsenic: Inorganic Chemistry. Encyclopedia of Inorganic Chemistry. pp 4. DOI: 10.1002/0470862106.ia013