TY - JOUR
T1 - An investigation of the catalytic systems Co(acac)2or3, C3H4, (iBu)3Al for the polymerization of propadiene
AU - van Ommen, J.G.
AU - Stijntjes, J.
AU - Mars, P.
PY - 1979
Y1 - 1979
N2 - 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.
AB - 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.
KW - IR-68452
U2 - 10.1016/0304-5102(79)80077-2
DO - 10.1016/0304-5102(79)80077-2
M3 - Article
SN - 0022-2860
VL - 5
SP - 1
EP - 13
JO - Journal of molecular structure
JF - Journal of molecular structure
IS - 1
ER -