How many types of `F-S-F` bonds are present in `SF_4`?

Options

A. 2
B. 3
C. 4
D. 5

Answer

A

Explanation

E.C. of `S_32` in its normal state =`1s^2 2s^2 3p^6 3s^2 3px^2 3py^1 3pz^1`
E.C. of `S_32` in the excited state = `1s^2 2s^2 2p^6 3s^2 3p_x^1 3p_y^1 3p_z^1 3d^1`
It undergoes `sp^3d` hybridization to give a trigonal bipyramidal arrangement in which one hybrid orbital occupies a lone pair and remaining four contain one electron each which is shared with those of F-atoms to form two types of F-S-F bonds (axial and equatorial).