Question

Give a short note on nucleophile.

Answer 1

Answer :

Nucleophilic Reagent -

The species (atom, ion or molecule) which have tendency to donaye a pair of electron are known as nucleophilic reagent or nucleophile.

The word nucleophile means nucleus loving. In a chemical reaction, it always attacks at that point where the electron density is low.

Nucleophile are itself electron rich. It behaves as a lewis base. It is represented by $Nu^-$.

Examples include : $Cl^{-}, NO_2^{-}$

Answer 2

Nucleophiles: A nucleophile is a species (anion or a molecule) which is strongly attracted to a region of positive charge.

Nucleophiles are either fully negative ions or have a strong –ve charge. Common nucleophiles are hydroxide ions, cyanide ions, water and ammonia.

Notice that each of these contains at least one lone pair of electrons either on an atom carrying a full negative charge or on a very electronegative atom carrying a substantial-charge.