但对邻二甲苯异构化反应，由于反应不是单纯由反应产物扩散控制，它们的对位选择性并无明显改善。
For isomerization of o-xylene the improvement in para-selectivity has not been observed, because the reaction is not mainly controlled by the diffusion of the reaction products.
研究结果表明该异构化反应先形成一个四元环过渡态而后转变为产物。
The obtained results show the isomerization reaction first forms a four membered ring transition state and then the product is got.
波长对异构化平衡组成及光解产物分布具有一定的影响。
The photoproduct distribution and the equilibrium composition of the isomers were influenced by UV wavelength.
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