9.4 Sigma and Pi Bonds

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    Sigma Bonds

    -Result from the end-to-end overlap of atomic orbitals (including hybrid orbitals)

    -All single bonds are sigma bonds.

    -The first bond of a double or triple bond is also a sigma bond.

    sigma bonds 01
    sigma bonds 02
    sigma bonds 03

    Pi Bonds

    -Result from the sideways overlap of ‘p’ orbitals

    -Only present in double and triple bonds

    -A double bond = 1 sigma bond and 1 pi bond

    -A triple bond = 1 sigma bond and 2 pi bonds

    pi bonds 01

    Identify all sigma and pi bonds in the following molecule.

    pi bonds 02