KCET2012ChemistryHaloalkanes and Haloarenes
Which of the following is not true for S _ N l reaction?
Options
- A3^ -alkyl halides generally react through S _ N 1 reaction
- BThe rate of the reaction does not depend upon the molar concentration of the nucleophile
- C1^ -alkyl halides generally react through S _ N 1 reaction
- DIt is favoured by polar solvents
Correct answer
C. 1^ -alkyl halides generally react through S _ N 1 reaction
Step-by-step solution
In S_ N 1 reactions, rate of the reaction depends upon the concentration of the substrate only. It does not depend upon the concentration of the nucleophile. In this type of reaction, covalent nucleophile reacts/attacks on substrate. 3^ alkyl halide generally react by this mechanism, whereas 1^ alkyl halide generally follow S _ N 2 reactions. S _ N 1 reactions are favoured by polar solvents.