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Questions
SF6 is known but SCl6 is not. Why?
Assign a reason for the following:
SCl6 is not known but SF6 is known.
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Solution
Due to their small size, six fluorine atoms can be accommodated around a sulphur atom, while chlorine atoms, being larger in size, are difficult to accommodate.
The other reason is that the fluorine, being highly electronegative and oxidising in nature, is capable of unpairing the paired orbitals of the valence shell of the sulphur atom and thereby showing the highest oxidation state of +6, while chlorine is not able to do this.
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