An investigation of the catalytic systems Co(acac)2or3, C3H4, (iBu)3Al for the polymerization of propadiene

J.G. van Ommen, J. Stijntjes, P. Mars

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In the catalytic systems Co(acac)2 or Co(acac)3, C3H4, (iBu)3Al, the active catalyst is formed via exchange of acac for iBu groups. From kinetic measurements it follows that Co(acac)2 and Co(acac)3 give the same catalyst with a polymerization rate constant k p = 29 ± 3 min−1 at relatively high Al/Co ratios (≥30). At low Al/Co ratios (≤0.05) a less active catalyst is formed with a polymerization rate constant kp = 3.6 ± 0.4 min−1, possibly due to the acac groups remaining in the catalytically active complex. The kinetic results show that the highly active cobalt catalyst is formed via an equilibrium with (iBu)3Al which indicates that the active catalyst complex is bimetallic.
Original languageUndefined
Pages (from-to)1-13
JournalJournal of molecular structure
Issue number1
Publication statusPublished - 1979


  • IR-68452

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