Lewis Acid/Base Theory helps us understand acid/base behaviour in the most general terms by focusing on how electrons are involved in acid/base reactions.
The bond formed between a Lewis acid and a Lewis base is a coordinate covalent bond because both electrons are provided by only one of the atoms (N, in the case of F 3 B:NH 3 ). In these cases, the Le...The bond formed between a Lewis acid and a Lewis base is a coordinate covalent bond because both electrons are provided by only one of the atoms (N, in the case of F 3 B:NH 3 ). In these cases, the Lewis base typically donates a pair of electrons to form a bond to the central atom of the molecule, while a pair of electrons displaced from the multiple bond becomes a lone pair on a terminal atom.