MCQ
Which of following is most reactive compound toward nucleophile ?
  • A
    $\begin{array}{*{20}{c}} {\,\,\,O}\\ {\,\,\,||}\\ {C{H_3} - C - Cl} \end{array}$
  • B
    $\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\ {C{H_3} - C{H_2} - C - Cl} \end{array}$
  • C
    $\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\ {C{H_3} - CH - C - Cl} \end{array}$
  • $\begin{array}{*{20}{c}} {\,\,\,\,\,\,C{H_3}\,\,\,O} \\ {\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,||\,\,\,\,} \\ {C{H_3} - C - C - Cl} \\ {|\,\,\,\,\,} \\ {\,C{H_3}} \end{array}$

Answer

Correct option: D.
$\begin{array}{*{20}{c}} {\,\,\,\,\,\,C{H_3}\,\,\,O} \\ {\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,||\,\,\,\,} \\ {C{H_3} - C - C - Cl} \\ {|\,\,\,\,\,} \\ {\,C{H_3}} \end{array}$
d
Electron deficient species are known as electrophiles.

Among the given, $H_{3} O$ has lone pair of electrons for donation, so it is not electron deficient and hence, not an electrophile.

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