Abstract
Shifting of the PMR signal of the CH proton to the strong field with an increase in the positive charge on the proton was found in nitroalkanes and nitrocarboxylic acid esters. This shift is due to the presence of steric interactions between the substituents and the CH proton, which are manifested by a change in the paramagnetic contribution to the magnetic shielding constant.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1769–1773, August, 1989.
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Shestov, V.I., Yurtanov, A.I., Zavel'skii, V.O. et al. Distribution of the electron density and proton chemical shifts in a series of nitromethane derivatives. Russ Chem Bull 38, 1619–1623 (1989). https://doi.org/10.1007/BF00956942
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DOI: https://doi.org/10.1007/BF00956942