Editing Arsine (section)

===Acid-base reactions===
The acidic properties of the As–H bond are often exploited. Thus, AsH<sub>3</sub> can be deprotonated:
::AsH<sub>3</sub> + NaNH<sub>2</sub> → NaAsH<sub>2</sub> + NH<sub>3</sub>

Upon reaction with the aluminium trialkyls, AsH<sub>3</sub> gives the trimeric [R<sub>2</sub>AlAsH<sub>2</sub>]<sub>3</sub>, where R = (CH<sub>3</sub>)<sub>3</sub>C.<ref name="Atwood">{{cite journal|author1=Atwood, D. A. |author2=Cowley, A. H. |author3=Harris, P. R. |author4=Jones, R. A. |author5=Koschmieder, S. U. |author6=Nunn, C. M. |author7=Atwood, J. L. |author8=Bott, S. G. |title=Cyclic Trimeric Hydroxy, Amido, Phosphido, and Arsenido Derivatives of aluminum and gallium. X-ray Structures of [tert-Bu<sub>2</sub>Ga(m-OH)]<sub>3</sub> and [tert-Bu<sub>2</sub>Ga(m-NH<sub>2</sub>)]<sub>3</sub>|journal=Organometallics|date=1993|volume=12 |pages= 24–29|doi=10.1021/om00025a010}}</ref> This reaction is relevant to the mechanism by which GaAs forms from AsH<sub>3</sub> (see below).

AsH<sub>3</sub> is generally considered non-basic, but it can be protonated by [[superacid]]s to give isolable salts of the tetrahedral species [AsH<sub>4</sub>]<sup>+</sup>.<ref name="Minkwitz">{{cite journal|author1=R. Minkwitz, R. |author2=Kornath, A. |author3=Sawodny, W. |author4=Härtner, H. |title=Über die Darstellung der Pnikogenoniumsalze AsH<sub>4</sub><sup>+</sup>SbF<sub>6</sub><sup>−</sup>, AsH<sub>4</sub><sup>+</sup>AsF<sub>6</sub><sup>−</sup>, SbH<sub>4</sub><sup>+</sup>SbF<sub>6</sub><sup>−</sup>|journal=Zeitschrift für Anorganische und Allgemeine Chemie|volume= 620 |pages= 753–756|doi=10.1002/zaac.19946200429|date=1994|issue=4|language=de}}</ref>