Which of the Following Is Not an Electrophile?
A) $\mathrm { H } ^ { + }$

Which of the following is not an electrophile?

A) $\mathrm { H } ^ { + }$
B) ${ } ^ { + } \mathrm { CH } _ { 3 }$
C) ${ } ^ { + } \mathrm { NO } _ { 2 }$
D) $\mathrm { Fe } ^ { 3 + }$
E) $\mathrm { CH } _ { 2 } = \mathrm { CH } _ { 2 }$