Osmabenzenes from the Reactions of HC≡CCH(OH)C≡CH with OsX2(PPh3)3 (X = Cl, Br)

Abstract
Treatment of OsX2(PPh3)3 (X = Cl, Br) with HC⋮CCH(OH)C⋮CH in THF produces OsX2(CHC(PPh3)CH(OH)C⋮CH)(PPh3)2, which reacts with PPh3 to give osmabenzenes [Os(CHC(PPh3)CHC(PPh3)CH)X2(PPh3)2]+.