JEE Main Chemistry question

Chemistry Organic Chemistry - Some Basic Principles and Techniques JEE Main

In the following leaving groups, –OAc (I), –OMe (II), –OSO₂Me (III, mesylate), –OSO₂CF₃ (IV, triflate), the order of leaving-group ability is

(A)I > II > III > IV
(B)IV > III > I > IICorrect
(C)III > II > I > IV
(D)II > III > I > IV

Answer: (B)

Solution

Leaving-group ability tracks the stability (weak basicity) of the departing anion, i.e., the acidity of its conjugate acid: triflate (from superacid

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Question ID VK-139809