Question

Which of the following is not isostructural with $\text{SiCl}_4$ ?

• A. $\text{SCl}_4$
• B. $\text{SO}^{2-}_4$
• C. $\text{PO}^{3-}_4$
• D. $\text{NH}^+_4$

Answer 1

Answer: (A)

$\text{SCl}_4$

Answer 2

$\text{SiCl}_4$ adopts a tetrahedral structure due to the four chlorine atoms arranged symmetrically around the silicon atom. On the other hand, $\text{SCl}_4$features four chlorine atoms and an additional lone pair on sulfur, causing it to assume a see-saw molecular geometry. The remaining molecules in the list maintain a tetrahedral geometry. Therefore, $\text{SCl}_4$ does not share the same structural arrangement as $\text{SiCl}_4$.

So, the correct option is (A): $\text{SCl}_4$