All the bonds in SF₄ are not equivalent Why - Chemistry - The p-Block Elements

Question

All the bonds in SF₄ are not equivalent Why ?

Shubhangini Kumari · Accepted Answer

The SF4 molecule is sp3d hybridized which has
a trigonal bipyramidal geommetry, but due to presence of a lone
pair of electrons at S-atom, the structure or shape of the molecule
becomes like see-saw, where two S-F bonds take axial position and
the two S-F atom takes equitorial position and so the bond length
varies due to the axial and equitorial natur eof the bonds
The structure may be represented as:
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/images/Untitled(20)%20png"
style="width: 194px; height: 175px;">

All the bonds in SF₄ are not equivalent. Why ?