arsoranes

https://doi.org/10.1351/goldbook.A00459
The mononuclear hydride $\ce{AsH5}$, systematically named \(\lambda ^{5}\)-arsane, and its hydrocarbyl derivatives. By extension the term also applies to arsonium ylides.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1320 [Terms] [Paper]