Nucleophile is a species that should have

A nucleophile must have :

The most nucleophilic species among the following in aprotic solvent

A nucleophilic reagent must necessarily have

Nucleophilicity of which species is least?

What do you understand by nucleophilic reagents and what type of species act as nucleophiles ? Give at least two examples.

Consider the species. overset(Θ)OH CH_(3)-overset(overset(Θ)O overset(Θ)CH_(3) overset(Θ)NH_(2) Arrange these nucleophilic species in their decreasing order of nucleophilicity :

For a typical nucleophilic aromatic substitution reaction to take place . 1. Nucleophilic atom should be of oxygen nitrogen or sulphur. 2. Leaving groups should be halide. 3. There should be strong electron withdrawing at ortho and para position to leaving group. Compare rate of nucleophilic aromatic substitution reaction in following reactants:

For a typical nucleophilic aromatic substitution reaction to take place . 1. Nucleophilic atom should be of oxygen nitrogen or sulphur. 2. Leaving groups should be halide. 3. There should be strong electron withdrawing at ortho and para position to leaving group. Fastest nucleophilic aromatic substitution reaction take place in :