synonyms: carbyne metal complexes, carbyne–metal complexes
https://doi.org/10.1351/goldbook.M03861
Metal complexes of the type $\ce{RCML_{n}}$ ($\ce{M}$ = metal, $\ce{L}$ = ligand) in which formally a carbyne is coordinated to a metal, e.g.
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1349 [Terms] [Paper]