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Which one of the following is not a hype...

Which one of the following is not a hypervalent compound?

A

`PF_5`

B

`SF_4`

C

`SiCl_4`

D

`IF_7`

Text Solution

Verified by Experts

The correct Answer is:
C
When an atom has a share of more than eight electrons, as does P in `PF_5`, we say that it exhibits an expanded valence shell or octet. This is sometimes referred to as hypervalence. In `SF_4`, sulphur (with 10 valence `e^(-)s`) has an expanded valence shell.
In `IF_7`, iodine (with 14 valence `e^(-)s`) has an expanded valence shell. Thus, `PR_5`, `SF_4`, and `IF_7` are examples of superoctet molecules. In `SiCl_4`, silicon (with 8 valence `e^(-)s`) has a complete octet. Thus, it is not a hypervalent compound.
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