Answer: NH3 is not an electrophile.
Nucleophile attacks an electrophilic centre of the substrate during a polar organic reaction. Similarly, the electrophiles attack at the nucleophilic centre, which is the electron-rich centre of the substrate. When the two undergo bonding interaction the electrophiles receive electron pairs from nucleophiles.
Examples of electrophiles include carbocations (CH3) and neutral molecules having functional groups like alkyl halides or a carbonyl group.
More information on Electrophiles
The crucial details related to the electrophiles have been elaborated below:
It can be introduced by using functionalized dialkylzinc reagent.
It can be inherently reactive or, more frequently, be generated by the metabolism of chemically inert compounds to reactive intermediates.
It either adds to a double bond or directly substitutes the pyran-2-one ring.
Examples of electrophiles are hydronium ion, boron trifluoride, aluminum chloride, fluorine, chlorine, bromine, and iodine.
Which of the following is not an electrophile?
Out of the given options, NH3 is not an electrophile.