Bismuth trifluoromethyl compounds

Organobismuth(III) halides may be prepared by elimination of aryl halide from triarylbismuth(V) dichlorides or dibromides upon heating (equation 4). Presumably, a bis-muth(V) compound is the intermediate when triarylbismuth compounds are treated with iodine or when trialkylbis-muth complexes are treated with chlorine, bromine, or iodine, but the intermediates have not been isolated and organobismuth halides are obtained directly (equation 5). The tris(trifluoromethyl)bismuth behaves like the trialkyl compounds without the observation of a bismuth(V) intermediate. ... 

An alternative approach to 1-aryl-3,3-bis(trifluoromethyl)-37/-2,l-benzoxabismole derivatives involves the reaction between the bismuthate complexes 10 with water or Mel. By this method, compounds 5 [95HAC293], 6 [92TL6653], 11 [95JA3922], and 12-14 are prepared [92TL6653, 95HAC293]. Transformations of this type of compound are described in detail in Section 4.2.1. 

Sterically crowded aryl bismuth compounds synthesis and characterization of bis 2,4,6-tris(tri luoromethyl)phenyl bismuth chloride and tris 2,4,6-tris(trifluoromethyl)phenyl bismuth. /. Organomet. Chem. 402 55-66. 

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