THE EFFECT OF A-OLEFINS ON THE RATE OF CYCLOOLEFIN POLYMERIZATION

Cometathesis of 1,5-cyclooctadiene and cyclopentene with alpha-olefins C-3. C-14 of normal structure was studied, and it was established tha t alpha-olefins decelerate polymerization of cyclopentene. This effect is associated with a decrease in the rate of the intramolecular react ions of disproportionation of double bonds and decoordination of the t erminal double bonds at the stage of cross-metathesis involving the cy cloolefin molecule compared to the rate of analogous reactions in cycl oolefin homopolymerization. The efficiency of the decelerating action of alpha-olefins is increased with an increase in the length of alkyl substituent at the double bond. The effective activation energies of c yclopentene and 1-hexene consumptions were found to be 73.4 and 90.6 k J/mol, respectively. It was shown that the reactivity of 1-hexene in c ometathesis with cyclopentene is reduced with decreasing temperature.