Electrophilic Aromatic Substitution Reactions of a Metallabenzene: Nitration and Halogenation of the Osmabenzene [Os{C(SMe)CHCHCHCH}I(CO)(PPh3)2]

Abstract

Aromatic by all definitions: Metallabenzenes are known to exhibit the physical properties of aromatic systems (ring planarity, equidistant C−C arene bonds, appropriate downfield NMR shifts). Now in addition, a classical chemical attribute of aromatic compounds, namely the ability to undergo electrophilic aromatic substitution reactions, has been observed with the nitration and halogenation reactions of complex 1 (L=PPh3, X=I).