3. Organometallic complexes have numerous applications, such as fine chemicas sy

Question

3. Organometallic complexes have numerous applications, such as fine chemicas syntheses and polymerisation reactions. Shown below are two catalysts that can be used for polymerisation reactions of different substrates (total: 15 points). Ar II H r. ROBu RO ) Determine what is the oxidation state, d electron count, and total electron count of the Zr centre in the zirconocene catalyst shown above (4 points). (ii) Given the MO diagram of a generic metallocene shown below and using the oxidation state of Zr from part (), identify what the HOMO and LUMO of the zirconocene by circling them (2 points). Ligand Metal

Explanation / Answer

(i). Oxidation state of Zr is +4 (Zr+4)

Neutralized with 2 CH3-, 2 C5H5-

The 16 electron are the electron count for Zirconocene

(ii). If you arrange these total 16 electrons in MO diagram, a1g is the HOMO and e1u is LUMO

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