arsanylium ions

https://doi.org/10.1351/goldbook.A00449
The arsanyl cation, $\ce{H2As^{+}}$, and derivatives by substitution. The name arsinylium (systematically derived from arsine) is not applied as it already designates $\ce{H2As(=O)^{+}}$, the acylium ion derived from arsinic acid.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1319 [Terms] [Paper]