Unprecedented formation of η4-(vinylketene)iron complexes from η4-(diene)iron complexes and aromatic compounds in the presence of a Lewis acid†
Abstract
A novel and unprecedented formation of η4-(vinylketene)iron complexes from η4-(diene)iron complexes is described herein. Treatment of η4-(diene)iron complexes with a Lewis acid such as GaCl3 or AlCl3 in the presence of aromatic compounds under a CO atmosphere affords η4-(vinylketene)iron complexes via electrophilic aromatic substitution.