From triarylbismuth dihalides and sulfonamides or amides

From triarylbismuth dihalides and sulfonamides or amides (method 

Crystalline bismuthine imides bearing an A-sulfonyl group have been prepared by the condensation of triphenylbismuth difluoride with A,A-bis(tri-methylsilyl)sulfonamides or of triarylbismuth dichloride with sulfonamides [93JFC(63)179]. The latter combination is also applicable to the synthesis of trianylbismuthine A -acylimides [99OM2580]. 

A mixture of triphenylbismuth difluoride (0.478 g, 1.0 mmol), Al,Al-bis(trimethylsilyl)trifluoro- 

Compound r Synthetic method Yield (%) M.p. (°) Physical data Reference 

Unsymmetrical compounds R 2R Bi=NS02CFi 4-MeCf,H4 2-OXC6H4 B 90 188-190 (decomp.) H-, C-NMR,IR, X-ray [97OM1013] 

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