What Is a Substitution Reaction?

Substitution reaction refers to the reaction in which any atom or atomic group in a compound or organic molecule is replaced by another atom or atomic group of the same type in a reagent. It is expressed by the general formula: R-L (reaction matrix) + AB (offensive Reagent) R-A (substitution product) + LB (leaving group) belongs to a class of chemical reactions.

Substitution reaction

• The substitution reaction can be divided into

  Aromatic electrophilic substitution reactions SEAr and aromatic nucleophilic substitution reactions SNAr (S stands for substitution, N stands for nucleophilic, Ar stands for aromatic), Ar stands for aryl. Aromatics pass

  Definition of substitution reaction: A reaction in which one atom or group of atoms in an organic molecule is replaced by another atom or group of atoms. Type comparison: Many reference books often compare it with displacement reactions, but in fact it is more like metathesis reactions. Example: Take the reaction between CH ₄ and Cl ₂ as an example. The principle is that one H is replaced by one Cl, that is, the CH bond becomes a CCl bond. The remaining Cl produces HCI with the substituted H. The characteristic is that one H is replaced, one Cl _{2 is} consumed, and one HCl is produced.

  Addition reaction definition: A reaction in which unsaturated carbon atoms in an organic molecule are directly combined with other atoms or atomic groups to form a new substance. Type comparison: From the point of view of the type of substance, it is similar to the chemical reaction. Example: Take the reaction between CH ₂ = CH ₂ and Br ₂ as an example. The principle is that one of the double bonds in C = C is broken, and two Cs each form a half bond, which are respectively combined with two Br. The characteristic is that double bonds become single bonds, and unsaturated becomes saturated.