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Consider an Sn2 reaction of NaSH in a polar aprotic solvent with (CH3)2CHCH2CH2X. What would be...

Consider an Sn2 reaction of NaSH in a polar aprotic solvent with (CH3)2CHCH2CH2X. What would be the relative order of reactivity for the following X substituents?

I. X= I II. X=Br III. X=Cl IV. X=F

A. I>II>III>IV

B.II>I>IV>III

C.IV>III>II>I

D.III>I>II>IV

E. None of these choices

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