Abstract
Butene oligomerization on NaH-Y zeolites in which some OH groups vibrating at 3640 cm−1 were removed by pyridine adsorption was studied by the i.r. spectroscopy. In each zeolitic supercage in which butene oligomerization takes place one proton is transmitted from the 3640 OH group to the oligomerizing butene molecules, and it is suggested that the oligomer is an alkyl carbo-cation. Another argument supporting this hypothesis was provided by measuring the extinction coefficients of C–H stretching vibration bands.
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