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Isotactic polymerization of methyl methacrylate using a prochiral, zirconium enolate initiator

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Jarvis,  A. P.
Research Group Mass Spectrometry, MPI for Chemical Ecology, Max Planck Society;

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Citation

Nguyen, H., Jarvis, A. P., Lesley, M. J. G., Kelly, W. M., Reddy, S. S., Taylor, N. J., et al. (2000). Isotactic polymerization of methyl methacrylate using a prochiral, zirconium enolate initiator. Macromolecules, 33(5), 1508-1510. doi:10.1021/ma991797l.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0012-B3DB-2
Abstract
There is considerable interest in the use of metallocene or lanthanocene complexes as initiators of polymerization of acrylate-based monomers.1 We and others have demonstrated that C2-symmetric, dialkyl zirconocene initiatorse.g. rac-en(H4Ind)2ZrX2 (1, X = Me)polymerize methyl methacrylate to isotactic poly(methyl methacrylate) (i-PMMA) by an enantiomorphic, site-control mechanism.2 While syndiotactic PMMA can be prepared using sterically encumbered, lanthanocene initiators at low temperatures,1a,c,d,g attempts to use Cs-symmetric, dialkyl zirconocene initiatorsi.e., Me2C(Cp)(Flu)ZrX2 (2, X = Me)for this purpose have been unsuccessful.2b,c