Can someone please help answer these questions about the MO of H2O? I think the

Question

Can someone please help answer these questions about the MO of H2O? I think the first part is that on diagram shows the orbitals mixing and the other doesn't, but I'm not sure. 10. Compare the two versions of the MO diagram of H20 shown. Close e of the MO diagram of H20 shown Close examination shows that they are not the same. What is the most important and obvious between these two diagrams? a) b) In your judgment, are these two different MO diagrams both reasonable options, or is one of them reasonable (perhaps even right!) and the other wrong? Explain. c) The PES for water is shown to the right. Is this consistent with either, both, or neither of the MO diagrams. Explain. nergy electron vela

Explanation / Answer

a) The first molecular orbital diagram the correct representation of molecular orbitals formed by mixing or hubrdization of atomic orbitals is shown. In the second digram the molecular orbitals does not corresponds to the actual number and energies of the atomic orbitals used for forming the molecule.

b) The first diagram is correct with total of 6 molecular orbitals, 3 bonding, 1 non-bonding and 2 antibonding molecular orbitals formed. The second diagram with 7 molecular orbitals set is the incorrect diagram.

c) The PES measures the energy needed to eject an elecron from the molecule and measures the kinetic energy of the ejected electron. The given PES diagram for H2O matched with the first MO diagram shown above.

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