From other oxybis triarylbismuth compounds

From other oxybis(triarylbismuth) compounds (method B) 

Various oxybis(triphenylbismuth) compounds can be prepared by the reaction of oxybis(triphenylbismuth) dichloride and silver salts [72JOM(36)323]. A combination of silver(I) oxide and sulfonic acids can also be used instead of silver sulfonates [88JOM(342)185], 

Silver cyanate (0.3 g, 2 mmol) was added to an acetone (50 ml) solution of oxybis(triphenyl-bismuth) dichloride (970 mg, 1 mmol) and the mixture was stirred for 5 h at around 5°C. It was then filtered and the filtrate was concentrated under vacuum. By adding water to the solution, oxybis(triphenylbismuth) dicyanate was obtained as a fine white powder. The compound was filtered and crystallized twice from dry acetone and diethyl ether Yield 40%, m.p. 139°C (decomp.) [72JOM(36)323]. 

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