Pyrolysis mechanisms quinoline

The presence of 1-indene imine has not been identified experimentally, although it is widely believed to be an important intermediate during pyrolysis of quinoline and isoquinoline. In order to better understand the fact that the total disappearance rates of quinoline and isoquinoline are the same and the pyrolysis products are also the same for both reactants. In order to verify the importance of 1 -indene imine intermediate, a smdy on the pyrolysis mechanism of quinoline and isoquinoline was done. The pyrolysis mechanisms of quinoline and isoquinoline leading to PI (HC = CCN, CgHg) and P2 (C2H2, CeHsCN) via 1-indene imine intermediate are proposed in Figure 8.22 [21]. 

The above researches show that the conformational tautomerism of 1-indene imine intermediate plays an important role in the kinetic mechanisms of pyrolysis of quinoUne and isoquionUne. 1-indene imine intermediate determines the composition of the pyrolysis products to be the same, and also determines the total disappearance rates of the reactants to be the same whether the original reactant is quinoline or isoquinoUne. The intramolecular hydrogen migration is an important reaction step, which appears widely in the paths of the pyrolysis mechanism. 

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