Analysis of 13C-satellites was carried out in the 13C NMR spectra of isoprene rubbers with a natural content of 13C carbon isotope. 13C-satellites are the signals caused by the one-bond spin–spin coupling of 13C nuclei. The spin–spin coupling 1J(13C–13C) constants, as well as the magnitude of the effect of the isotopic substitution 1Δδ13C(13/12C), were measured under magnetic shielding of 13C nuclei. The results indicate that the configurational and local conformational structure of natural and synthetic isoprene rubbers is identical.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 85, No. 6, pp. 912–918, November–December, 2018.
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Makhiyanov, N. Signals of Isotopomers in 13C NMR Spectra of Polyisoprene Rubbers. J Appl Spectrosc 85, 1037–1043 (2019). https://doi.org/10.1007/s10812-019-00756-x
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DOI: https://doi.org/10.1007/s10812-019-00756-x