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

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Ommen van, J.G. and Stijntjes, J. and Mars, P. (1979) An investigation of the catalytic systems Co(acac)2or3, C3H4, (iBu)3Al for the polymerization of propadiene. Journal of Molecular Structure, 5 (1). pp. 1-13. ISSN 0022-2860

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Abstract: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.
Item Type:Article
Copyright:© 1979 Elsevier Science
Link to this item:http://purl.utwente.nl/publications/68452
Official URL:http://dx.doi.org/10.1016/0304-5102(79)80077-2
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