Structure and Reactivity of α,β-Unsaturated Ethers. XII. Cationic Copolymerization of Ring-Substituted Styryl Ethyl Ethers
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概要
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Several ring-substituted derivatives of <I>cis</I>- and <I>trans</I>-styryl ethyl ethers were copolymerized with the unsubstituted <I>trans</I> ether in methylene chloride at −70°C with the use of boron trifluoride etherate as a catalyst. The ring substituents investigated include <I>p</I>-CH<SUB>3</SUB>O, <I>p</I>-CH<SUB>3</SUB>, <I>m</I>-CH<SUB>3</SUB>, <I>p</I>-Cl, and <I>m</I>-Cl. It was found that the effects of substituents on the polymerizability obey the Hammett ρσ relationship with reaction constants ρ=−2.4 and −2.0 for <I>cis</I> and <I>trans</I> isomers, respectively. The structure of the transition state of the cationic polymeization was discussed.
- 公益社団法人 日本化学会の論文
著者
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Fueno Takayuki
Faculty Of Engineering Science Osaka University
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Okuyama Tadashi
Faculty Of Engineering Science Osaka University
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Asami Nobuhiro
Faculty of Engineering Science, Osaka University
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