You are about to undertake kinetic comparisons of rates and intimate mechanism of fluoride ion exchanges of SF6 and free F– versus SeF6 and free F–, in a suitable invert solvent. Which of the following statements are likely to be correct?

SF6 is more likely to react by dissociative mechanism since S6+ is smaller & has reached is maximum coordination number & therefore unlikely to associate with another F⊝.

You are about to undertake kinetic comparisons of rates and intimate mechanism of fluoride ion exchanges of SF6 and free F– versus SeF6 and free F–, in a suitable invert solvent. Which of the following statements are likely to be correct?

SF6 is more likely to react by dissociative mechanism since S6+ is smaller & has reached is maximum coordination number & therefore unlikely to associate with another F⊝.

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You are about to undertake kinetic comparisons of rates and intimate mechanism of fluoride ion exchanges of SF₆ and free F^– versus SeF₆ and free F^–, in a suitable invert solvent. Which of the following statements are likely to be correct?

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SF₆ is more likely to react by dissociative mechanism

SF₆is more likely to react by associative mechanism

Both react by dissociative mechanism

SF₆ is more likely to react rapidly

answer is A, B, D.

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Detailed Solution

SF₆ is more likely to react by dissociative mechanism since S⁶⁺ is smaller & has reached is maximum coordination number & therefore unlikely to associate with another $F^{⊝}$ .

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