Organic reagents Electrophilic ,Nucleophilic , Free radicals

Organic reagents are categorized into three sections according to their charge as electrophile ,nucleophile and free radicals. Electrophiles have less electrons density, nucleophiles have high electrons density and free radicals don't have special charge. But free radicals are very reactive and react very fast.

  1. Electrophilic reagents( electrophile )
  2. Nucleophilic reagents(nucleophile)
  3. Free radicals
organic reactions examples


Electrophilic reagents( electrophile )

Groups which have less density of electrons or positive charges, are called electrophilic reagents. Electrophilic reagents can attract electron from lewis alkaline compounds(NH3) or high electrons density compounds (alkenes, benzene ring in the phenol or aniline).


Examples of electrophilic reagents

examples electrophilic reagents

Reactions of electrophilic compounds

The first step of benzene nitrosation. In this step Π electrons of benzene make a bond with +NO2 to form C-N bond.



Nucleophilic reagents(nucleophile)

Groups which have high density of electrons or negative charges or ,lone electron pair are defined as nucleophilic reagents. Nucleophilic reagents have the ability to accord electron to less electron groups.


Examples of nucleophilic reagents

examples nucleophilic reagents

Reactions of nucleophilic reagents

in the reaction of aqueous NaOH and alkyl bromide reaction OH- ion behaves as a nucleophile and give a alcohol as the product.



Free radicals

Groups which have unpaired valence electron are called free radicals . Free radicals are very reactive than electrophilic reagents and nucleophilic reagents. Free radicals are formed at the time reaction occurs.


Examples of electrophilic reagents


examples free radicals


Reactions of free radicals

Methane chlorination under sun light. Many free radicals such as Cl., .CH3, .CH2Cl and more forms.

Free radicals forms in photochemical smog which exist in high traffic cities.



Is Aluminium chloride a electrophile?

Yes. Aluminium chloride (AlCl3) is a electrophile. Also AlCl3 is Lewis acid.