Triphenylbismuth difluoride

Triphenylbismuth dichloride, 4 33 Triphenylbismuth difluoride, 4 27 Triphenylbismuth dimethacrylate, 4 33 Triphenylbismuthine, 4 26 Triphenylbismuth iodide isocyanate, 4 32 Triphenylbismuth iodide azide, 4 32 Triphenylbismuth oxide, 4 32 Triphenylcarbamate... 

Alkenyltriphenylbismuthonium salts are formed by refluxing triphenylbismuth difluoride BF3 OEt2 and alkenyl-trimethylsilanes (Scheme 22).247... 

When treated with iodine pentafluoride, triphenylbismuthane gives triphenylbismuth difluoride but no evidence for the formation of bismuth(V) derivatives was found in the reactions with tris(4-fluorophenyl)bismuthane and tris(trifluoromethyl)bismuthane. Fluorine-aryl (or alkyl) exchange takes place in these cases instead of oxidative fluorination.139140... 

Triphenylbismuth difluoride [2023-48-5], C18H15BiF2, has been obtained in a similar manner (63). 

Triphenylbismuth difluoride (2) reacted with terminal acetylenes in the presence of a catalytic amount of cuprous chloride to afford moderate to good yields of the phenylacetylene derivative. The reaction was claimed to involve the formation of a pentaorganyl intermediate, which undergoes a... 

Triphenylbismuth difluoride has been synthesized by thermal decomposition of a cationic triphenylbismuth(V) complex [Ph3Bi(OAsPh3)2][Bp4]2 in dichloromethane [731C944]. Tetraphenylbismuth tribromide is transformed thermally to triphenylbismuth dibromide [52LA(578)136], while tetraphenylbismuth triphenylsiloxide is readily cleaved by HCl to give triphenylbismuth dichloride [75DOK(225)581]. 

Pentacoordinate cationic complexes of the type (Ph3BiL2)Y2 can be prepared by the reaction of triphenylbismuth dichloride with a silver salt AgY in the presence of a ligand molecule L [73IC944]. These complexes are stable in the solid state, but decompose in solution. Triphenylbismuth difluoride is formed from the thermal decomposition of [Ph3Bi(OAsPh3)2][BF4]2. 

To a well stirred solution of triphenylbismuth difluoride (478 mg, 1 mmol) in dichloromethane (5 ml) at 0°C was added trimethylsilyl triflate (0.19 ml, 1 mmol). After 1 h, hexamethyldisilox-ane (0.11 ml, 0.5 mmol) was added and stirring was continued for a further 24 h at ambient temperature to complete the reaction. The solvent was removed under reduced pressure to leave an oily residue, which was recrystallized from dichloromethane to give oxybis(triphenylbis-muth) ditriflate as colorless crystals in 95% yield, m.p. 205-206°C [94JCS(P1)1739]. 

To a dichloromethane (5 ml) solution of triphenylbismuth difluoride (478 mg, 1 mmol) was added dropwise boron trifluoride diethyl etherate (0.12 ml, 1 mmol) at 0°C under argon. After stirring for 1 h, 3,3-dimethyl-2-trimethylsiloxy-l-butene (172 mg, 1 mmol) was introduced and the resulting mixture was stirred for 10 h at room temperature. Evaporation of the solvent under reduced pressure left an oily residue, which was crystallized from ether-dichloromethane (2 1) to give the bismuthonium tetrafluoroborate (601 mg, 96%) as colorless crystals (m.p. 143-145°C) [94JCS(P1)1739]. 

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-... 

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