Selective access to electron donating group substituted (η⁵-cyclohexadienyl)Mn(CO)₃ complexes by bimetallic manganese-palladium activation

Unprecedented (η⁵-cyclohexadienyl)Mn(CO)₃ complexes bearing an electron-donating group at the end of the π system have been selectively prepared using Pd catalysis and primary, secondary cyclic, and acyclic amines. This catalytic methodology has been extended to O-, S-, and P-based derivatives. The X-ray structure of one coupling product exhibits an unusual conformation in its η⁵ system.