Summary
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1.
It is shown that the isoporpyl group in the ortho position of the styrene molecule does not cause steric hindrance in the polymerization process.
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2.
It is shown that 2-methoxyl groups in the ortho position of the styrene molecule do not hinder polymerization.
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3.
2,4,5-trisopropylacetophenone and 2,4,5-triisopropylstyrene have been synthesized.
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4.
Polymers of 2,4,5-triisopropylstyrene and 2,6-dimethoxystyrene have been prepared.
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5.
An explanation based on stereoehemical grounds is given for the absence of steric hindrance in the polymerization of 2,4,5-triisopropylstyrene and 2,6-dimethoxystyrene; an explanation is also given for the occurence of steric hindrance in the polymerization of 2,6,dimethyl-4tertiarybutylstyrene and 2,4,6-tri- ( fluoromethyl)styrene.
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Korshak, V.V., Matveeva, N.G. Macromolecular compounds Communication 58. Steric hindrance in the polymerization of nuclear-substituted styrenes. Russ Chem Bull 2, 491–497 (1953). https://doi.org/10.1007/BF01171527
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DOI: https://doi.org/10.1007/BF01171527