A group which departs from the substrate in a nucleophilic...

A group which departs from the substrate in a nucleophilic substitution reaction is called a leaving group. The ease of departure is determined by the acidity of the conjugate acid of the leaving group; higher the acidity better is the leaving group. The correct order of the reactivity of the following compounds in a given nucleophilic reaction is-

Options

A $\mathrm{R}-\mathrm{Cl}>\mathrm{R}-\mathrm{OCOCH}_3>\mathrm{R}-\mathrm{OSO}_2 \mathrm{CH}_3>\mathrm{RI}$
B $\mathrm{R}-\mathrm{OSO}_2 \mathrm{CH}_3>\mathrm{R}-\mathrm{Cl}>\mathrm{R}-\mathrm{OCOCH}_3>\mathrm{ROH}$
C $\mathrm{R}-$ \mathrm{I} $>\mathrm{RNH}_2>\mathrm{R}-\mathrm{OCOCH}_3>\mathrm{R}-\mathrm{OSO}_2 \mathrm{CH}_3$
D $\mathrm{R}-\mathrm{Br}>\mathrm{R}-\mathrm{OSO}_2 \mathrm{CH}_3>\mathrm{R}-\mathrm{OCOCH}_3>\mathrm{ROCH}_3$

Correct answer

D. $\mathrm{R}-\mathrm{Br}>\mathrm{R}-\mathrm{OSO}_2 \mathrm{CH}_3>\mathrm{R}-\mathrm{OCOCH}_3>\mathrm{ROCH}_3$

Step-by-step solution

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