Linear 1‐alkenes undergo concurrent dimerization and double bond isomerization on the solid acid catalyst Amberlyst®15. Kinetic data show that double bond isomerization occurs on a site where the alkene adsorption coefficient is small, whereas alkene dimerization occurs on a site where the alkene adsorption coefficient is large. The fraction of isomerization sites occupied by alkene is small, whereas the dimerization sites are practically saturated with alkene. Logically, two different types of acid sites must exist on the surface of Amberlyst®15 catalyst. On the dimerization sites, substantial skeletal rearrangement occurs, likely via rapidly isomerizing carbenium ions, π‐complexes, and/or protonated cyclopropyl intermediates.

中文翻译：

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并非所有酸位点都相等：烯烃异构化和二聚化发生在Amberlyst®15催化剂的不同位点上

线性1-烯烃在固体酸催化剂Amberlyst®15上同时进行二聚和双键异构化。动力学数据表明，双键异构化发生在烯烃吸附系数小的位置，而烯烃二聚化发生在烯烃吸附系数大的位置。烯烃占据的异构化位点的比例很小，而二聚化位点实际上被烯烃饱和。逻辑上，Amberlyst®15催化剂的表面必须存在两种不同类型的酸位。在二聚化位点上，可能发生大量的骨架重排，可能是通过快速异构化碳正离子，π-络合物和/或质子化的环丙基中间体造成的。