Question

The species having pyramidal shape is

• A. $S{O}_3$
• B. $Br{F}_3$
• C. $Si{O}_3^{2-}$
• D. $OS{F}_2$

Answer 1

The correct option is D

$OS{F}_2$

Firstly, we will calculate value of ep and get the geometry.

$\Rightarrow S{O}_3\Rightarrow ep=\frac{(V+L+A-C)}{2}=\frac{6}{23}$ [AVSEPR] [Trigonal Planar]

$\Rightarrow Br{F}_3\Rightarrow ep=\frac{(7+3)}{2}=5$ [Trigonal Bipyramidal]

$\Rightarrow Si{O}_3^{2-}\Rightarrow ep=\frac{(4+2)}{2}=3$ [AVSEPR] [Trigonal Planar]

$\Rightarrow OS{F}_2\Rightarrow \frac{(6+2)}{2}=4$ [AVSEPR] [Tetrahedral]

$S{O}_3\Rightarrow$

$Br{F}_3\Rightarrow$

$Si{O}_3^{2-}\Rightarrow$

$OS{F}_2\Rightarrow$

Therefore, here we can see that in structure we do not take lone pairs into count.

So, $OS{F}_2$ has a pyramidal shape