Halophilic reactions of pentafluorohalobenzenes with transition-metal carbonyl anions

In the present work we widen the scope of the halophilic mechanism of nucleophilic aromatic substitution, which we found earlier for the reaction of pentafluorochlorobenzene with [CpFe(CO)2]− anion, to reactions of pentafluorohalobenzenes (Hal=Cl, Br, I) with various metal carbonyl anions [Re(CO)5]−, [Mn(CO)5]− and [CpFe(CO)2]−. Nucleophilic aromatic substitution with the [CpFe(CO)2]− anion yields C6F5Fe(CO)2Cp, while with [Re(CO)5]− and [Mn(CO)5]− anions the halo(acyl)metallates cis-[C6F5(CO)M(CO)4Hal]Na (M=Mn, Re) are obtained.