Although thousands of examples of carbonyl complexes are known, the chemistry of the flu...

Although thousands of examples of carbonyl complexes are known, the chemistry of the fluoroborylene (BF) ligand is still in its infancy.

a. Prepare a molecular orbital energy level diagram of BF, showing how the atomic orbitals of B and F interact.

b. On the basis of your answer to part a , would you expect BF to be a stronger or weaker π- acceptor ligand than CO? Explain.

c. The first example of a transition metal complex containing a bridging BF has recently been reported; its structure is shown below. (D. Vidovic, S. Aldridge, Angew. Chem., Int. Ed. , 2009 , 48 , 3669). The long-known dimeric Ru complex has C—O vibration bands at 1939 and 1971 cm ^–1 . Do you predict that the molecule shown below is ikely to have C—O bands at higher or lower energy than Explain your reasoning.