Why in the Geometry of BrF5 is the lone pair is in axial

Last updated: 7/4/2023

Why in the Geometry of BrF5 is the lone pair is in axial Case 1 when the lone pair is in equatorial plane me ans the Lone Pair bond pair repulsion would be only 2 but in the first case it is total of 4 1 one pair bond pair repulsion then how it co mes out to be the structure of BrF5 used in various places