Ligand coordination to oxybis triarylbismuth compounds

Ligand coordination to oxybis(triarylbismuth) compounds (method C) 

Treatment of anhydrous oxybis(triphenylbismuth) perchlorate with oxygen-donor bases results in the formation of pentacoordinate cationic complexes [73IC944]. Dimethyl sulfoxide, pyridine iV-oxide, triphenylphosphine oxide and triphenylarsine oxide are commonly employed ligands. 

Synthesis of oxybis(triphenylbismuth) diperchlorate-bis(triphenylphosphine oxide) 

Anhydrous oxybis(triphenylbismuth) diperchlorate and triphenylphosphine oxide were mixed in a 1 2 molar ratio in absolute alcohol. The solution was allowed to stand overnight. Dropwise addition of petroleum ether (b.p. 35-60°C) until the solution became turbid, followed by refrigeration, gave the product as crystals. The complex was recrystallized from absolute alcohol containing free ligand, washed successively with benzene and petroleum ether, and dried in vacuo [73IC944]. 

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

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