Which of the following is not true for `S_(N) 1` reaction ?

Options

A. Favoured by polar solvents
B. `3^(@)` - alkyl halides generally react through `S_(N) 1` reaction
C. The rate of the reaction does not depend upon the molar concentration of the nucelophile .
D. `1^(@)`- alkyl halides generally react through `S_(N)` 1 reaction .

Answer

D

Explanation

`S_N 1` reaction is favoured by bulky groups on the carbon atom attached to halogens , i.e., the order of reactivity is `underset("Tertiary") (R_(3)C) - X gt underset("Secondary") (R_(2) CH)- X gt underset("Primary") (RCH_(2)) - X gt underset("Methyl") (CH_(3) - X)`