(η 6-Arene)tricarbonylchromium and (η 5-cyclohexadienyl) tricarbonylmanganese complexes: indirect nucleophilic substitutions

Abstract

Treatment of X-substituted (η 6-arene)tricarbonylchromium complexes with a nucleophile and a proton source afforded new arenetricarbonylchromium complexes via chromium hydride intermediates and elimination of HX ( cine and tele nucleophilic aromatic substitutions). Treatment of (η 5-X-substituted-cyclohexadienyl)tricarbonyl manganese complexes with hydride and a proton source gave η 5-cyclohexadienyl complexes resulting from a cleavage of the C–X bond: the η 3-X-substituted cyclohexenyl intermediates underwent elimination of an agostic hydrogen and the X group.