Summary
Samples of title polymer have been prepared by ring-opening metathesis polymerisation of dimethyl 7-oxabicyclo[2.2.1]hept-2-ene-exo, exo-5,6-dicarboxylate I using a ruthenium catalyst. Comparison of the NMR spectra obtained from samples prepared in two different solvents enables the differences in polymer microstructure to be established. When tetrahydrofuran is used as solvent, a highly tactic polymer with high trans vinylene content is produced. In contrast, when ethanol/water is used as solvent, the polymer exhibits an atactic microstructure and contains approximately equal amounts of cis and trans vinylene bonds.
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References
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Gilbert, M., Herbert, I.R. NMR spectroscopic characterisation of the microstructure of poly(dimethyl 7-oxabicyclo[2.2.1]hept-2-ene-exo, exo-5,6-dicarboxylate). Polymer Bulletin 30, 83–89 (1993). https://doi.org/10.1007/BF00296238
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DOI: https://doi.org/10.1007/BF00296238