The most nucleophilic molecule will be CH3S^- and most nucleophilic molecule will be CH3COOH.
When referring to compounds that frequently transfer electron pairs towards electrophiles in a bid to form chemical bonds with them, the term "nucleophile" is employed. Every ion or molecule with a free electron pair or even a pi bond with two electrons seems to have the capacity to act in a nucleophilic manner.
a nucleophile is an atom as well as the molecule which searches for a positively center during a chemical reaction, including the nucleus and an atom, since the nucleophile seems to have a pair of electrons that are ready for bonding.
The increasing order of nucleophilicity is CH3S- > CH3O- >CH3COO->CH3OH >CH3COOH.
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