Lewis theory of acids and bases

The Lewis theory of acids and bases expands the definitions beyond the traditional ones. In this framework, a Lewis acid is any substance that can accept a pair of electrons, while a Lewis base is any substance that can donate a pair of electrons. This theory helps to explain various chemical reactions and interactions that don't fit the classic definitions of acids (which produce protons) and bases (which produce hydroxide ions). By focusing on electron transfer, Lewis theory provides a broader understanding of acid-base chemistry, applicable in many areas, including organic chemistry and coordination chemistry.