Is substitution reaction a high-risk process under strict supervision?
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Is substitution reaction a high-risk process under strict supervision? Is the polycondensation reaction considered a high-risk process that requires strict supervision?
The scope of substitution reactions is too broad; it’s not possible to make general statements. It has to be determined based on the specific conditions of substitution. For example, chlorination is considered a process that requires strict supervision. All the polycondensation reactions I’ve encountered have been considered in terms of polymerization processes; it’s nothing more than a bit of wordplay.
First, it is necessary to clarify what atom is being replaced in the reaction. If Cl replaces the H atom of a hydrocarbon, it is a chlorination reaction ； If -NO2 replaces the H atom of a hydrocarbon, it belongs to a nitration reaction ； Wait. For the polycondensation reaction, it is necessary to consider the magnitude of the heat of reaction as well as the relationship between reaction rate and temperature; generally, it can be approached by referring to polymerization reactions. If the reaction releases very little heat and is a slow reaction, or if it is an endothermic reaction, then, after explaining the situation and obtaining approval from the **safety regulatory authorities and safety assessment agencies, it may not need to be treated as a hazardous chemical process.
It is necessary to specify exactly which group is replaced in a substitution reaction, and which bond is formed during a polycondensation reaction. For example, the nitration of toluene is also a substitution reaction, but it falls under the category of hazardous processes that are subject to strict regulation
The concepts of substitution and polycondensation are too broad to be generalized