Question

Which of the following is strongest nucleophile

• A. $B{r}^{-}$
• B. $:O{H}^{-}$
• C. $:C{N}^{-}$
• D. $C_2{H}_5\bar{O}$

Answer 1

Answer: (C)

The strength of nucleophile depends upon the nature of alkyl group $R$ on which nucleophile has to attack and also on the nature of solvent. The order of strength of nucleophiles follows the order :
$C{N}^{-}>I^{-}>C_6{H}_5{O}^{-}>O{H}^{-}>B{r}^{-}>C{l}^{-}$