Question

Draw a molecular orbital diagram for Mo(CO)6. What is the point group symmetry?

Answer 1

Molybdenum (Mo)is d-block element having atomic number 42 having electronic configuration [Kr]4d⁵5s¹

Mo = [Kr]4d⁵5s¹

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                                    4d                                                                     5s

On formation of complex with CO(strong) ligand cofiguration Mo is [Kr]4d⁵5s⁰

Mo(CO)₆ structure is octahetdral and have Oh point group.

CO is very strong ligand so there is large crystal filled splitting of d -orbital so there is pairing of electron so we get low spin complex.Mo has zero oxidation state in this complex.

Molecular orbital diagram of Mo(CO)₆ :-