$S{ F }_{ 6 }$ is inert towards hydrolysis. Why?

CBSE Class 12 CBSE Class 12 Chemistry
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1

(i) $S{ F }{ 6 }$is known but SC16 is not. Why?
(ii) $S{ F }{ 6 }$ is inert towards hydrolysis. Why?

2

(i) Fluorine atom is smaller in size, SO six ${{F}^{-}}$ ions can
surround a sulphur atom. The case is not so with chlorine atom due to its large size. So, SF6 is known but SC16 is not known due to interionic repulsion between larger Cl- ions.
(ii) In SF6, the six F atoms sterically protect the sulphur atom from attack by water due to steric hindrance. Further, F does not have ^/-orbitals to accept the electrons donated by H20 molecules. As a result of these two reasons, SF6 does not undergo hydrolysis.