Catalyst Deactivation Processes During 1-Hexene Polymerization
Keyword(s):
Esi Ms
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<p>The catalyst [Cp<sub>2</sub>Zr(<i>μ</i>-Me)<sub>2</sub>AlMe<sub>2</sub>]<sup>+</sup>[B(C<sub>6</sub>F<sub>5</sub>)<sub>4</sub>]<sup>−</sup> (<b>1</b>) has been studied by electrospray ionisation mass spectrometry (ESI-MS) in order to better understand the complexities of catalyst deactivation in the polymerisation of 1-hexene. Using offline, online and flow-based methods, we observe that zirconium π-allyl species are unstable in solution and previously unobserved dimethylalane complexes are more stable. The dimethylalane complexes are resistant to further 1-hexene additions and their formation represent a new pathway for catalyst deactivation.</p>
2001 ◽
Vol 334
(1)
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pp. 49-59
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2006 ◽
Vol 25
(6)
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pp. 572-582
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