Interpretation:
The homonuclear diatomic molecules in which addition and removal of electrons have the same effect on the bond order are to be identified and the reason for this effect is to be explained.
Concept introduction:
Two atomic orbitals combine in order to form one bonding and one antibonding molecular orbital. The orbitals that lie on internuclear axis combine to form
(sigma) molecular orbital, and the orbitals parallel to each other combine to form
The molecular orbital formed by the combination of
orbital forms bonding molecular orbital designated as
orbital forms corresponding molecular orbitals.
Molecular orbital formed by the combination of
orbital forms a bonding molecular orbital designated as
and an antibonding molecular orbital designated as
Molecular orbitals formed by the combining of
orbitals form bonding molecular orbitals designated as
and
and antibonding molecular orbitals designated as
and
Bond order is determined by subtracting the number of electrons present in the antibonding orbitals from the number of electrons present in the bonding orbitals and dividing by two.
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