A new preparation of tricarbonyl(η5-pentadienyl) manganese

Manganese Hydrocarbon Complexes Excluding Cyclopentadienyl

“…Formation of dimer (88) apparently is the result of a [2 + 2] thermal cycloaddition of (T| -diene)manganese complex (89), and not a product of photodimerization. 56 Facile exchange of naphthalene with benzene provides anionic complex (90), which undergoes endo protonation regiospecifically to provide (r| 5 -dienyl)manganese complex (91) (Scheme 10).…”