A Lewis acid is a chemical species that accepts an electron pair from another molecule during the formation of a covalent bond. Unlike the traditional concept of acids and bases, which focuses on proton donors and acceptors, the Lewis definition emphasizes the role of electron pair donors and acceptors.
Topic 16.3: 16.3 Alkylation and Acylation of Aromatic Rings: The Friedel–Crafts Reaction
Unit 16