stannylidenes

https://doi.org/10.1351/goldbook.S05932
carbene analogues having the structure R2Sn:. The older synonymous term stannylenes is no longer recommended.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1366 (https://doi.org/10.1351/pac199567081307)