Question

Strongest nucleophile among the following is:

• A. $\stackrel{\theta }{O}H\left(aq\right)$
• B. $H_{2}O\left(aq\right)$
• C. ${NH}_3\left(aq\right)$
• D. $\stackrel{\theta }{O}{C}_2{H}_5\left(aq\right)$

Answer 1

The correct option is D $\stackrel{\theta }{O}{C}_2{H}_5\left(aq\right)$

Nuceophileicity $\propto e^{-}density$

$\propto +I$

$\therefore$ anions are better nucleophile than neutral atoms

Now, among $O{H}^{-}$ and $OE{t}^{-}$

$Et$ has more $+I$ then $-H$

$\therefore OE{t}^{-}$ is best nucleophile