Abstract
Abstract The dimerization of 1,3-cyclopentadiene has been studied in the chloroaluminate ionic liquids. The rate of dimerization of cyclopentadiene is higher in the 1-ethyl-3-methyl-1H-imidazolium chloride (EMIC)-containing chloroaluminate than in the N -1-butylpyridinium chloride (BPC)-containing chloroaluminate. Acceleration of the dimerization process is noted take place with increasing AlCl 3 contents in both BPC and EMIC and is attributed to the Lewis acid catalysis. The temperature-dependent studies indicate that high temperature induces the dimerization. Quantitative information on the extent of dimerization of 1,3-cyclopentadiene in some Diels–Alder reactions has been offered in this work.
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