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Nucleophiles are electron rich species that seek out a positive charge to balance themselves out

These can come under many different forms


Halide Ions Hydroxide Alkoxide Hydride Carbanions

Neutral Molecules With LPE

Water Alcohols Ammonia and Amines

Species With \(\pi\) Bonds

The \(\pi\) bond is comparatively weak (compared to its \(\sigma\) bond counterpart) and a secondary \(\pi\) bond will be even weaker. As a result, it behaves as a nucleophile.

Alkenes Alkynes Benzene