Hydrochloric Acid → Bicyclo[2.2.1]hept-2-ene, polymer with ethene

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Reaction Steps

First of all, 0.200 mmole of the chromium compound from Example 5 was suspended in 50 mL of toluene. This solution was then put into a 250-mL glass autoclave. Subsequently, 40 mL of a norbornene-toluene solution (318.60 mmoles of norbornene) were added to this solution. The reaction mixture thus obtained was first brought to a temperature of 0° C. [32° F.] and subsequently saturated with ethene for 30 minutes at 3 bar. Then the reaction was started by adding 1.34 g of MAO (Cr:Al=1:50) dissolved in 20 mL of toluene. After a reaction time of 1.5 hours, the reaction was interrupted by dripping the polymerization mixture into a mixture of methanol and hydrochloric acid. The polymer precipitate obtained in this process was filtered off, washed with methanol and dried in a vacuum at 70° C. [158° F.]. The yield was 28 g of a polymer having a Tg of 128° C. [262.4° F.].

Provenance & Evidence