NTA Abhyas JEE Main2020ChemistryGeneral Organic ChemistryPractice
In the nucleophilic substitution reactions S N 2 or S N 1 the reactivity of alkyl halides follows the sequence
Options
- AR-I > R-Br > R-Cl > R-F
- BR-Cl > R-F > R-Br > R-I
- CR-F > R-Cl > R-Br > R-I
- DR-I > R-F > R-Cl > R-Br
Correct answer
A. R-I > R-Br > R-Cl > R-F
Step-by-step solution
Nucleophilic substitution reaction depends on learning group ability The correct order of reactivity is RI   >   RBr   >   RCl   >   RF  It is due to fact, that weaker the base, better will be the leaving group. Leaving group ability I − > Br − > Cl > F −