A NOVEL ROUTE OF DOUBLE-BOND MIGRATION OF AN OLEFIN WITHOUT PROTONATED SPECIES ON ZSM-5 ZEOLITE
A NOVEL ROUTE OF DOUBLE-BOND MIGRATION OF AN OLEFIN WITHOUT PROTONATED SPECIES ON ZSM-5 ZEOLITE
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ZSM-5沸石上无质子化物质的烯烃双键迁移新路线
DOI：
10.1021/jp9707504
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发表时间：
1997
影响因子：
3.3
通讯作者：
Fumitaka Wakabayashi
中科院分区：
文献类型：
--
作者：
J. Kondo;K. Domen;Fumitaka Wakabayashi
发现了1-丁烯在分子筛Bronsted酸中心（BAS）上发生双键迁移（DBM）的新反应，而BAS上的质子不转移到吸附的烯烃上，这一反应被广泛认为是导致DBM上的酸性OD基团转化为OH的质子化中间体。然而，与吸附的1-丁烯形成1：1复合物的OD基团即使在反应后也没有变化。OD基团的同位素交换发生在高于DBM的温度下。因此，在BAS上存在一种新型的反应，这比质子转移更容易发生。
A novel reaction of the double-bond migration (DBM) of 1-butene on Bronsted acid sites (BAS) of zeolites in the absence of proton transfer from BAS to the adsorbed olefin was found. The widely accepted protonated intermediate should result in the conversion of the acidic OD groups to OH upon the DBM. Nevertheless, the OD groups forming a 1:1 complex with the adsorbed 1-butene were unchanged even after the reaction. The isotope exchange of OD groups occurred at a higher temperature than that of the DBM. Thus, the existence of a new type of reaction on BAS is demonstrated, which takes place more easily than the proton transfer.