Question
Why NF3 is pyramidal but BF3 is triangular planar?
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Answer
In NF3, N is surrounded by three F atoms and a lone pair thus, have lp-bp repulsion along with bp-bp repulsion.
Thus, its shape is pyramidal.
In BF3, B is surrounded by only three F atoms, i.e. have no lone pairs, so only repulsion present in it is bp-bp.
Thus, its shape is triangular planar.
Thus, its shape is pyramidal.
In BF3, B is surrounded by only three F atoms, i.e. have no lone pairs, so only repulsion present in it is bp-bp.
Thus, its shape is triangular planar.
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