electron effect;  spatial effects;  Organic properties;  Reaction

The electron effect between atoms or groups in organic molecules or intermediates, namely induction effect, conjugation effect, superconjugation effect, and spatial effect, was studied and analyzed, focusing on the stability of organic matter or intermediate, as well as the reaction orientation of electrophilic, nucleophilic and free radicals, and the results showed that the electron effect had an important impact on the stability and reactivity of organic matter or intermediate, and the spatial effect also had an important impact, and sometimes even the main influencing factor.