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Question
In a bonded molecule, the order of repulsion between the bonded and non-bonded electrons is:
In a bonded molecule, the order of repulsion between the bonded and non-bonded electrons is:
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Solution
The correct option is C lone pair - lone pair > lone pair - bond pair > bond pair - bond pair
Lone pair-lone pair lp−lp repulsions are considered stronger than lone pair-bonding pair lp−bp repulsions, which in turn are considered stronger than bonding pair-bonding pair bp−bp repulsions, This is because the lone pair of electrons are attracted towards single nuclei only whereas bond pair electrons are attracted towards two nuclei. Thus the strength of the lone pair-lone pair repulsion is supposed to be more than bond pair-bond pair or bond pair-lone pair repulsion.
Lone pair-lone pair lp−lp repulsions are considered stronger than lone pair-bonding pair lp−bp repulsions, which in turn are considered stronger than bonding pair-bonding pair bp−bp repulsions,
This is because the lone pair of electrons are attracted towards single nuclei only whereas bond pair electrons are attracted towards two nuclei. Thus the strength of the lone pair-lone pair repulsion is supposed to be more than bond pair-bond pair or bond pair-lone pair repulsion.
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