The C2 unit can form bridges between transition metals. For example, has been reported....

The C2 unit can form bridges between transition metals. For example, has been reported. (See P. Belanzoni, N. Re, A. Sgamellotti, C. Floriani, J. Chem. Soc., Dalton Trans. , 1997 , 4773.)

a. Show how two Mn(CO)₅ fragments can interact in a sigma fashion with a bridging C ₂ ligand.

b. Show how pi interactions can occur between C₂ and the Mn(CO)₅ fragments, with the Mn(CO)₅, using orbitals not involved in the sigma interactions.

c. Compare your results with those reported in the literature.