bismuthines

https://doi.org/10.1351/goldbook.B00675
BiH3 and compounds derived from it by substituting one, two or three hydrogen atoms by hydrocarbyl groups: R3Bi, RBiH2, R2BiH ( RH ) are called primary, secondary and tertiary bismuthines, respectively. A specific bismuthine is preferably named as a substituted bismuthane, e.g. (CH3)3Bi trimethylbismuthane.
See:
bismuthanes
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1323 [Terms] [Paper]