Stereoelective Polymerization of Racemic α-Olefins by Highly-Active Chirally Modified Ziegler-Natta Catalysts

  • F. Ciardelli
  • C. Carlini
  • F. Menconi
  • A. Altomare
  • J. C. W. Chien

Abstract

The possibility of inducing the preferential polymerization of a single enantiomer from a racemic α-olefin(stereoelective polymerization) by using optically active Lewis bases firstly shown for conventional Ziegler-Natta catalysts(1), was extended by Pino and coworkers(2,3) to highlyactive systems such as MgCl2/TiCl4 ·B*/Al(i.Bu)3·B*. In this last case (-)-menthyl anisate(B*) was used both as “internal”(IB) and as “external” (EB) Lewis base. IB and EB can in general play different roles by interacting to different extent with the transition metal and the aluminum alkyl.

Keywords

Ethyl Toluate MgCl Fractionation Diethyl 

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References

  1. 1.
    Carlini C, Ciardelli F (1981) Chim Ind(Milan) 63: 486–491Google Scholar
  2. 2.
    Pino P, Fochi G, Piccolo O, Giannini U (1982) J Am Chem Soc 104: 73817383Google Scholar
  3. 3.
    Pino P, Guastalla G, Rotzinger B, Mülhaupt R (1983) in: Proc Internat Symp on “Transition Metal Catalyzed Polymerizations: Unsolved Problems” Midland(USA) pp 435–463Google Scholar
  4. 4.
    Ciardelli F, Carlini C, Altomare A, Menconi F (1987) J C S Chem Commun 94–95Google Scholar
  5. 5.
    Chien JCW, Wu JC (1982) J Polym Sci Polym Chem Ed 20: 2019–2032CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • F. Ciardelli
    • 1
  • C. Carlini
    • 2
  • F. Menconi
    • 1
  • A. Altomare
    • 1
  • J. C. W. Chien
    • 3
  1. 1.Dipartimento di Chimica e Chimica IndustrialeUniversità di Pisa, Centro di Studio del CNR per le Macromolecole Stereordinate ed Otticamente AttivePisaItaly
  2. 2.Dipartimento di Chimica Industriale e dei MaterialiUniversità di BolognaBolognaItaly
  3. 3.Polymer Science & Engineering DepartmentUniversity of MassachusettsAmherstUSA

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