Question

The geometrical shapes of $Xe{F}_5^{+},Xe{F}_6,$ and $Xe{F}_8{}^{2-}$ respectively are

• A. trigonal bipyramidal, octahedral, and square planar
• B. square-based pyramidal, distorted octahedral, and octahedral
• C. planar pentagonal, octahedral, and square anti prismatic
• D. square-based pyramidal, distorted octahedral, and square antiprismatic

Answer 1

Answer: (D)

Number of electron pair in $Xe{F}_5^{+}=\frac{1}{2}(8+5-1+0)=6$

$\Rightarrow s{p}^3{d}^2:$ Square-based pyramidal

Number of electron pair in $Xe{F}_6=\frac{1}{2}(8+6-0+0)=7$

$\Rightarrow s{p}^3{d}^3;$ distorted octahedral In $Xe{F}_8^{2-}$,

Number of electron pair in $=\frac{1}{2}(8+8+2)=9$