Question

Which of the following have undistorted octahedral structures?
$(1) SF_6 $
$(2) PF_6^-$
$ (3)SiF^{2-}_6$
$(4)XeF_6$
Select the correct answer using the codes given below:

• A. $2, 3$ and $4$
• B. $1,3$ and $4$
• C. $1,2$ and $3$
• D. $1,2$ and $4$

Answer 1

Answer: (C)

$XeF_6$ has distorted octahedral structure. Xenon in $XeF_6$ undergoes $sp^3d^3$ hybridization giving pentagonal bipyramid in which one. axis is occupied by a lone pair.