Question

The shape of $Xe{F}_5^{-}$ will be

• A. Square pyramid
• B. Trigonal bipyramidal
• C. Planar
• D. Pentagonal bipyramid

Answer 1

Answer: (C)

Shape of $Xe{F}_5^{-}\to$

The Xe show $s{p}^3{d}^3$-hybridisation in $Xe{F}_5^{-}$,
Thus, its geometry is Pentagonal-bipyramidal.
But, number of electron pair $=\frac{8+5+1}{2}=7$
Number of bond pair $=5^2$, number of lone pair $=2$ .
A lot of electrons are present at axil position and all bonds are in same plane.
Hence, the shape is planar.