Conclusions
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1.
A study has been made of the13C NMR spectra of isomeric Z,Z-, Z,E-, E,Z-, and E,E-arnesols, farnesyl bromides, and ethyl farnesenates, and also of oligomeric silyl ethers (V)-(IX) prepared by ozonolysis and further conversion of natural rubber.
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2.
Criteria are proposed for identifying Z- and E-isoprene units in polyisoprenoids.
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3.
The thermal stability of the Z configuration of isoprenoid units in the ozonolysis products of natural rubber is confirmed.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 388–391, February, 1979.
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Shashkov, A.S., Grigor'ev, N.Y., Avrutov, I.M. et al. Determination of the configuration of acyclic isoprenoids by13C NMR spectroscopy. Russ Chem Bull 28, 359–362 (1979). https://doi.org/10.1007/BF00925883
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DOI: https://doi.org/10.1007/BF00925883