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SF6 is known but SCl6 is not. Why ?...

`SF_6` is known but `SCl_6` is not. Why ?

Text Solution

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This is due to (i) Small size of fluorine (ii) High electronegativity of fluorine. Fluorine being highly electronegative can oxidize sulphur to (+6) oxidation state and can be accomodated easily due to its small size.
Chlorine on the contrary, cannot be accomodated due to its large size. Thus, `SCl_6` does not exist.
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