arsanylidenes

Synonym: arsinidenes
https://doi.org/10.1351/goldbook.A00448
Recommended name for @[email protected] having the structure R–As: (former IUPAC name is arsinediyls). A common non-IUPAC synonym is arsinidenes.
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]