Halophilic reactions of pentafluorohalobenzenes with transition-metal carbonyl anions

Abstract

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 C 6F 5Fe(CO) 2Cp, while with [Re(CO) 5] − and [Mn(CO) 5] − anions the halo(acyl)metallates cis-[C 6F 5(CO)M(CO) 4Hal]Na (M=Mn, Re) are obtained.