Enantiomorphic Sites and Stereospecific Polymerization of Chiral 1-Olefins

  • Francesco Ciardelli
  • Carlo Carlini
  • Angelina Altomare


The main objective of the present contribution is on the one side to show the diagnostic potentiality offered by the use of chiral monomers and on the other side to discuss relationships between stereochemistry at the prochiral face and side chain in the monomer.


Titanium Zirconium Adduct Fractionation Oligomer 

List of Symbols and Abbreviations


is racemic 4 methyl-l-hexene


is racemic 3-methyl-1 -pentene


is racemic 3,7-dimethyl-l-octene


is optically active (5)-3-methyl-1-pentene


is racemic 3-methyl-1-hexene


is “internal” Lewis base


is “external” Lewis base


is ethyl benzoate


is p-cresol


is p-methyl toluate


is (-)-menthyl benzoate


is (-)-menthyl anisate


is (-)-dimenthyl terephthalate


is dimethyl terephthalate


is ethyl anisate


is triethylaluminium


is triistfbutylaluminium


is (R)-N, N-diethyl-α-phenylethylamine




is(-)menthyl acetate


is bis[(S)-2-methylbutyl] phthalate


is phenyltriethoxysilane


is specific optical rotation

D763 and D732

are the optical densities of the IR bands

Pp = Pm(l—C)/C, where Pm

is the optical purity of the non-polymerized monomer and C is the conversion


is the optical purity of polymerized monomer

E = Pp/([B*]/[Ti]) (%), where [B*]

is the concentration of optically active Lewis base in the catalyst


is the ratio of the polymerization rates of (R)- and (S)- enantiomer of the monomer, respectively


catalyst = MgCl2/ IB/PC/AlEt3/TiCl4/Al(iBu)3-EB


type catalyst was obtained from a soluble MgCl2-ROH adduct


is methylalumoxane


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Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • Francesco Ciardelli
    • 1
    • 2
  • Carlo Carlini
    • 3
  • Angelina Altomare
    • 1
  1. 1.Dipartimento di Chimica e Chimica IndustrialeUniversità di PisaPisaItaly
  2. 2.Centro CNR delle Macromolecole Stereoordinate ed Otticamente AttivePisaItaly
  3. 3.Dipartimento di Chimica Industriale e dei MaterialiUniversità di BolognaBolognaItaly

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