Stereoisomerism of Epoxide Polymers

Epoxide polymers exhibit stereoisomerism originating from the chirality of tertiary carbon atoms present in the polymer main chain. The stereoisomers of epoxide polymers are therefore tactic polymers their tacticity is connected with the structure of epoxide monomers undergoing polymerisation. Epoxide 

Note that stereoregular polymers of disubstituted epoxides with a threo-diisotactic and eryt/zro-disyndiotactic structure have not been synthesised. 

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