Question

Tell me why are the lone pairs placed axially?

Answer 1

Lone pairs are placed in axial positions in Trigonal Bi pyramidal structure according to bent rule which states that highest electronegative elements acquire axial positions and multiple bonded atoms acquires equitorial position

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Answer 2

Answer:

Lone pairs are very repulsive, especially with respect to other lone pairs, so we want the next lone pair to be as separated as possible from the first. The axial bond is further from the lone pair then any of the equatorial bonds, so it makes sense for the lone pair to go there.