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Question

Which of the following statements are correct about SF4?


A

It is prepared by treating SCl2 with a fluoride like NaF in acetonitrile.

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B

Its initial hydrolysis gives SO2 and HF.

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C

It has a square planar shape with the sulphur atom having 2 lone pairs.

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D

S atom has an expanded octet.

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Solution

The correct option is D

S atom has an expanded octet.


\SF_4\) is prepared by treating SCl2 with a fluoride in acetonitrile:

3SCl2+4NaFSF4+S2Cl2+4NaCl

Alternatively, it cood be synthesized in sizable yields by combining an ionic fluoride like NaF with elemental sulphur and chlorine. On hydrolysis:

SF4+2H2OSO2+4HF

This reaction explains why SF4 is toxic as it reacts with the moisture in the lungs. Both the products are acidic.


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