Nucleophilic Addition Reactions of Tricarbonyl [η5-1-(Phenylthio)Cyclohexadienyl]Iron(I) Complex

Hydride abstraction of tricarbonylη⁴phenylthio)-l,3-cyclohexadiene]iron(0) complex 2 with Ph₃C⁺PF₆^? regiospecifically provided the title compound 3 in excellent yield. Cationic complex 3 could react with a variety of nucleophiles in good yield. Hard nucleophiles prefer to attack at the C-l position, whereas soft and hindered nucleophiles favor attack at the C-5 position. Some synthetic applications were also studied.