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which molecules have the same bond order?

* Be2

*O2

*N2

*Li2

*B2

*C2

*F2

1 Answer

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  • Anonymous
    1 decade ago
    Favorite Answer

    write molecular orbital configuration of all the species ...

    Be2 = [sigma(1s)]^2 [sigma*(1s)]^2 [sigma(2s)]^2 [sigma*(2s)]^2

    bond order = 1/2(2-2) = 0

    O2 = [sigma(1s)]^2 [sigma*(1s)]^2 [sigma(2s)]^2 [sigma*(2s)]^2 [sigma(2pz)]^2 [pi(2px)]^2 [pi(2py)]^2 [pi*(2px)]^1[pi*(2py)]^1

    bond order = 1/2(8-4) = 4/2 = 2

    N2 = [sigma(1s)]^2 [sigma*(1s)]^2 [sigma(2s)]^2 [sigma*(2s)]^2 [pi(2px)]^2 [pi(2py)]^2 [sigma(2pz)]^2

    bond order = 1/2(8-2) = 6/2 = 3

    Li2 = [sigma(1s)]^2 [sigma*(1s)]^2 [sigma(2s)]^2

    bond order = 1/2(4-2) = 2/2 = 1

    B2 = [sigma(1s)]^2 [sigma*(1s)]^2 [sigma(2s)]^2 [sigma*(2s)]^2 [pi(2px)]^1 [pi(2py)]^1

    bond order = 1/2(4-2) = 2/2 = 1

    C2 = [sigma(1s)]^2 [sigma*(1s)]^2 [sigma(2s)]^2 [sigma*(2s)]^2 [pi(2px)]^2 [pi(2py)]^2

    bond order = 1/2(6-2) = 4/2 = 2

    F2 = [sigma(1s)]^2 [sigma*(1s)]^2 [sigma(2s)]^2 [sigma*(2s)]^2 [sigma(2pz)]^2 [pi(2px)]^2 [pi(2py)]^2 [pi*(2px)]^2 [pi*(2py)]^2

    bond order = 1/2(8-6) = 2/2 = 1

    Li2 , B2 ,F2 have same bond order i.e. 1

    C2 and O2 have same bond order i.e. 2

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