Question

Which of the following would have a permanent dipole moment

• A. $B{F}_3$
• B. $Xe{F}_4$
• C. $Si{F}_4$
• D. $S{F}_4$

Answer 1

The correct option is D

$S{F}_4$

Due to distorted tetrahedral geometry $S{F}_4$ has permanent dipole moment

$\stackrel{\underset{|}{F}}{\underset{\stackrel{|}{F}}{{:-S}_{{╲}_F}^{{╱}^F}}}$