Question

Electrophiles are electron seeking species. Which of the following groups contain only electrophiles?

• A. $B{F}_3,N{H}_3,H_{2}O$
• B. $AlC{l}_3.S{O}_3,N{O}_2^{+}$
• C. $N{O}_2^{+},C{H}_3^{+},C{H}_3-\stackrel{+}{C}=O$
• D. $C_2{H}_5^{-},{\stackrel{\bullet }{C}}_2{H}_5,C_2{H}_5^{+}$

Answer 1

Answer: (B), (C)

The correct options are
B $N{O}_2^{+},C{H}_3^{+},C{H}_3-\stackrel{+}{C}=O$
C $AlC{l}_3.S{O}_3,N{O}_2^{+}$

Electron deficient or positive charge species behave like electrophile. $N{H}_3$ is electron rich due to lone pair of electrons and $C_2{H}_5^{-}$ is electron rich because of negative chargr. Hence option B and C .