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    So this is a diagram in my lecture handout on bonding in methanal.

    The larger p orbital (top diagram) is due to the lone pairs on Oxygen (?).

    Why then does the size of the orbitals switch when we consider the pi* orbital ?

    Why the change ?

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    (Original post by Ari Ben Canaan)
    So this is a diagram in my lecture handout on bonding in methanal.

    The larger p orbital (top diagram) is due to the lone pairs on Oxygen (?).

    Why then does the size of the orbitals switch when we consider the pi* orbital ?

    Why the change ?

    Name:  Photo on 10-04-2013 at 18.17.jpg
Views: 106
Size:  55.7 KB
    Larger coefficients of the atomic orbitals closer in energy to the MO. Think about the MO diagram for this bond. The bonding orbital is more O 2p like and the antibonding is more C 2p like.
 
 
 
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