Question

Which one of the following has (have) octahedral geometry ?
(i) $SbC{l}_6^{-}$
(ii) $SnC{l}_6^{2-}$
(iii) $Xe{F}_6$
(iv) $I{O}_6^{5-}$

• A. (i), (ii) & (iii)
• B. (i), (ii) & (iv)
• C. (ii), (iii) & (iv)
• D. All of these

Answer 1

Answer: (B)

Except (iii) i.e. $Xe{F}_6$, all other show octahedral geometry.

$Xe{F}_6$ has $6\sigma$ bonds and one lone pair of electrons, hence show distorted octahedral structure also known as pentagonal bipyramidal with one lone pair.

All other shows octahedral geometry.

(i) $SbC{l}_6^{-}$ :

(Octahedral with no lone pair)

(ii) $SnC{l}_6^{2-}$ :

(Octahedral with no lone pair)

(iii) $Xe{F}_6$ :

(Distorted octahedral with one lone pair)

(iv) $I{O}_6^{5-}$:

(Octahedral with no lone pair)