Synthesis of Polymeric Topological Isomers through Double Metathesis Condensation with H‐Shaped Telechelic Precursors

Abstract

AbstractSummary: An H‐shaped poly(tetrahydrofuran), poly(THF), having four terminal allyl groups was prepared through the covalent conversion of an ionically linked polymer assembly, comprised of four units of cationic poly(THF) having a pyrrolidinium salt and an allyl end group, and one unit of anionic poly(THF) having two dicarboxylate end groups. A pair of polymeric topological isomers, having double‐cyclic, manacle, and θ‐shaped constructions, was subsequently produced under dilution through the intramolecular double metathesis condensation of four terminal allyl groups of the H‐shaped precursor.The formation of manacle‐shaped and θ‐shaped architectures by the intramolecular double metathesis condensation of an H‐shaped poly(tetrahydrofuran) with four terminal allyl groups.magnified imageThe formation of manacle‐shaped and θ‐shaped architectures by the intramolecular double metathesis condensation of an H‐shaped poly(tetrahydrofuran) with four terminal allyl groups.