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The reaction of 1-butene over ferrierite has been studied by 13 C MAS NMR. It is shown that extensive double bond isomerisation and the formation of dimers, mainly dimethyl-hexenes and trimethyl-pentenes, dominate the early catalytic events. Strong interactions between the butene double bond and the Bronsted acid sites shift and broaden the butene olefinic signal extensively. The olefinic...
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