Bismuthyl

Bismuthyl means a chemical species formally derived from the element bismuth and can refer to substituents bonded to the rest of a molecule through a bismuth atom, including:

derivatives of bismuthanes, BiR₃, such as the diphenylbismuthyl group, Ph₂Bi–, found in the ion [Ph₂Bi−(Ge₉)−BiPh₂]²⁻
trivalent bismuth species when considered as ligands, such as the tribromobismuthyl ligand, Br₃Bi→

In inorganic chemistry bismuthyl has been used to describe compounds such as BiOCl which were assumed to contain the diatomic bismuthyl, BiO⁺, cation, that was also presumed to exist in aqueous solution.[1] This diatomic ion is not now believed to exist.[2]

References

Godfrey, S. M.; McAuliffe, C. A.; Mackie, A. G.; Pritchard, R. G. (1998). Nicholas C. Norman (ed.). Chemistry of arsenic, antimony, and bismuth. Springer. pp. 67–84. ISBN 0-7514-0389-X.
Wiberg, Egon; Holleman, A. F.; Wiberg, Nils (2001). Inorganic chemistry. Academic Press. ISBN 0-12-352651-5.

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[norman1-1] Godfrey, S. M.; McAuliffe, C. A.; Mackie, A. G.; Pritchard, R. G. (1998). Nicholas C. Norman (ed.). Chemistry of arsenic, antimony, and bismuth. Springer. pp. 67–84. ISBN 0-7514-0389-X.

[2] Wiberg, Egon; Holleman, A. F.; Wiberg, Nils (2001). Inorganic chemistry. Academic Press. ISBN 0-12-352651-5.