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Issue 13, 2018
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A new echelon of precision polypentenamers: highly isotactic branching on every five carbons

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Abstract

A series of allylic substituted cyclopentene monomers with increasing steric bulk are investigated by ring opening metathesis polymerization to understand the effects of these substituents on the microstructural outcomes of the resulting polypentenamers. 3-Triethylsiloxycyclopentene is discovered to polymerize to a highly regular microstructure with up to 96% trans olefins and 92% head-to-tail positional isomers. Dynamic resolution after synthetic modifications produced an enantiopure version (∼92% ee) of this monomer which subsequently produced a precision isotactic and regioregular polypentenamer for the first time. Synthetic investigations, mechanistic aspects, and basic thermal properties are discussed.

Graphical abstract: A new echelon of precision polypentenamers: highly isotactic branching on every five carbons

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Publication details

The article was received on 15 Nov 2017, accepted on 16 Dec 2017 and first published on 02 Jan 2018


Article type: Paper
DOI: 10.1039/C7PY01922J
Citation: Polym. Chem., 2018,9, 1719-1727
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    A new echelon of precision polypentenamers: highly isotactic branching on every five carbons

    S. Brits, W. J. Neary, G. Palui and J. G. Kennemur, Polym. Chem., 2018, 9, 1719
    DOI: 10.1039/C7PY01922J

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