Question

Which one of the following has (have) octahedral geometry ? (i) $SbCl^{-}_6$ (ii) $SnCl^{2-}_6$ (iii) $XeF_6$ (iv) $IO^{5-}_6$

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

Answer 1

Answer: (B)

(i), (ii) & (iv)

Answer 2

Except (iii) i.e. $XeF _{6}$, all other show octahedral geometry.

$XeF _{6}$ 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) $SbCl^{-}_{6}$ :

(Octahedral with no lone pair)

(ii) $SnCl^{2-}_{6}$ :

(Octahedral with no lone pair)

(iii) $XeF_{6}$ :

(Distorted octahedral with one lone pair)

(iv) $IO^{5-}_{6}$:

(Octahedral with no lone pair)