How can chirality influences or forms different conformations in case of vinyl polymers (‐CH2‐C*HR‐)n ?

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anor277 Share
Feb 8, 2018

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The classic example is polypropylene....

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Polypropylene can be prepared with 3 different stereochemistries....

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#"Atactic....with no order to along the methylene backbone..."#

#"Isotactic....with definite order to along the methylene backbone..."#

#"Syndiotactic....with alternating order along the methylene backbone..."#

These polymers are prepared by catalysts, i.e. metal centres with specialty ligands, that DIRECTLY influence the geometry of the polymer chain. In the best circumstances the reaction can be made to be stereospecific, i.e. the given geometry of the catalyst gives rise to a definite stereochemistry in the resultant polymer.

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