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A theory for the stereospecific polymerization of propylene oxide by ferric chloride

✍ Scribed by E.J. Corey

Publisher
Elsevier Science
Year
1959
Tongue
French
Weight
629 KB
Volume
1
Category
Article
ISSN
0040-4039

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✦ Synopsis

THE polymerization of &l_-propylene oxide under the catalytic influence of ferric chloride may be described grossly by equation(l which X and Y represent terminal units, possibly Cl, OH or an unsaturated group, FeCl + X-CH,-OH-0-(CH~-OH-O)~-FH2-CB-Y (I> cR3 9 7 Although the catalyst for the reaction and the gross structure of the polymer are unexceptional, the stereochemistry of the polymerization is extraordinary, Under the conditions which have been utilized for the polymerization, about 30-40 per cent of the polymeric product from d,l-propylene axide,is the isntactic __ 1 variety in which essentially all.

of the a8ymmetric carbon8 of a given polymer molecule pos8eas the ssme configuration, 2 Thus, the optically inactive crystalline polymer consists of a mixture of all fi-and all A-pol.ymer molewles.

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