Question

The strong nucleophile and the best leaving group in the following reaction are respectively
$C{H}_{3}x+N{u}^{-}\to C{H}_3-Nu+x^{-}$

• A. $Ph{O}_{{}^{\prime }}^{-}C{l}^{-}$
• B. $O{H}_{{}^{\prime }}^{-}B{r}^{-}$
• C. $Ac{O}_{{}^{\prime }}^{-}{F}^{-}$
• D. $C{H}_3{O}_{{}^{\prime }}^{-}{I}^{-}$

Answer 1

Answer: (D)

The order of nucleophilicity is
Among the halide ions, the order in which the leaving groups depart is $I^{-}>B{r}^{-}>C{l}^{-}>F^{-}$