ABSTRACT
These reactions are known in industrial processes and occur simply by decomposition and in gas phase. However, it is a nonelementary chain reaction and occurs in different elementary steps. For reactions such as thermal cracking in gas phase, there are several kinetic models, but the most interesting one is the model of Rice-Herzfeld. The main idea is that in the first step of the reaction, the abstraction of the H from the reactant molecule occurs and subsequently there is decomposition with formation of a new radical. The process takes place through the steps of initiation, propagation, and termination.
