1. a) Derive the reducible representation for the sigma-bonding set of ligand orbitals in the square planar [Pt(II)NH3]2+ complex b) Find the

[Pt(II)NH3]2+ complexb) Find the irreducible representations of this ligand group orbitals and construct a sigma only Molecular Orbital diagram (Don’t think about the pi bonding)c) Label all levels with the appropriate symmetry designationsd) Identify the frontier molecular orbitalse) Do you expect this complex ion to be colored? Why or why not?f) Assume the NH3 is replaced by four Cl- ligands. Qualitatively, what would happen to the frontier molecular orbitals (in terms of energy)? Would you expect to observe a blue or red shift? Explain your answer.

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