|Class 12 Chemistry Haloalkanes and Haloarenes||Strong nucleophile and Weak Nucleophile|
Strong nucleophile & Weak Nucleophile
Usually anions with a full negative charge and no steric hindrance. Nucleophilicity increase with increase in charge density. For example, NaOR, RLi, NaOH or KOH, NaCN or KCN, NaCCR, NaNH2, NaNHR, NaI, LiBr, KI, NaN3.
Weak Nucleophile: Neutral. For example,
Basicity and Nucleophilicity essentially describe same phenomenon, except basicity concerns donation of lone pair of hydrogen and Nucleophilicity concerns donations of lone pair to all other atoms.