Estimation of Formation Enthalpy for Alkanes from 13C NMR Chemical Shifts

doi:10.11938/cjmr20182656

Abstract

Abstract: The quantitative relationship between the ¹³C NMR chemical shifts of alkanes and their formation enthalpy was studied. A new approach for calculating the formation enthalpy from the ¹³C NMR chemical shifts was proposed. The experimentally measured formation enthalpy values of 53 alkanes were correlated with the parameters SCS (the sum of chemical shift),P3 (path counts of length three bounds) and n (the number of carbon atoms). The regression results showed a good correlation (R=0.998 2,S=3.5 kJ/mol). The random sampling method and leave-one-out method were used to verify the stability and prediction ability of the model.

Key words: alkanes, formation enthalpy, ¹³C NMR, chemical shift, path counts of length three bounds (P3)

CLC Number:

WU Ya-xin, CAO Chen-zhong, TENG Li-li. Estimation of Formation Enthalpy for Alkanes from ¹³C NMR Chemical Shifts[J]. Chinese Journal of Magnetic Resonance, 2019, 36(1): 65-73.

References

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Estimation of Formation Enthalpy for Alkanes from ¹³C NMR Chemical Shifts

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