Q.
In BrF3 molecule, the lone pairs occupy equatorial positions to minimise
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AIPMTAIPMT 2004Chemical Bonding and Molecular Structure
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Solution:
In BrF3 molecule, Br is sp3d hybridised, but its geometry is T-shaped due to distortion of geometry from trigonal bipyramidal to T-shaped by the involvement of lone pair-lone pair repulsion.
Here, lp−lp repulsion =0 lp−bp repulsion =4 bp−bp repulsion =2