Stereo- and enantioselective polymerization of hexa-1,5-diene on heterogeneous Ziegler-Natta catalysts obtained with the use of optically active internal donors
Abstract:Pure racemates and individual enantiomers of diethyl 2,3 diisopropylsuccinate ((+,-) DIPS and (-) DIPS) and 2,3 diisopropyl 1,4 dimethoxybutane ((+,-) DPDMB and (+) DPDMB) were prepared. The synthesized compounds and diethyl phthalate were used as internal donors for the preparation of heterogeneous Ziegler-Natta catalysts. Polymerization of hexa 1,5 diene was carried out on these catalysts. The obtained samples of poly(methylene 1,3 cyclo pentane) were studied by 13 С NMR spectroscopy and polarimetry. The ind… Show more
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