Q.

Give the reactivity in the decreasing order of the following nucleophiles towards nucleophilic addition reaction with compound A F3C−≡-CF3. (I) CH3O-          (II) C2H5O-  (III) CH3COO⊖    (IV) CH3SO3⊖

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a

(II) > (I) > (III) > (IV)

b

(IV) > (III) > (I) > (II)

c

(I) > (II) > (IV) > (III)

d

(III) > (IV) > (II) > (I)

answer is A.

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Detailed Solution

In the same nucleophilic centre, nucleophlilicity is parallel to basic character. Stronger the acid, weaker is the conjugated base.Acidic character order: CH3SO3H>CH3COOH>CH3OH>C2H5OHBasic and nucleophilicity order:CH3SO3-
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Give the reactivity in the decreasing order of the following nucleophiles towards nucleophilic addition reaction with compound A F3C−≡-CF3. (I) CH3O-          (II) C2H5O-  (III) CH3COO⊖    (IV) CH3SO3⊖