Abstract
A calculation has been made of the influence of the electric field of π-electronic charges on the chemical shifts of the meso-protons in β-ethoxycarbonyl-substituted porphyrins. A comparison of the calculated and experimental figures shows that the change in the chemical shifts taking place with the introduction of ethoxycarbonyl substituents into the β-position is due mainly to the changes in the π-electronic charges.
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Mamaev, V.M., Zenin, S.V., Ponomarev, G.V. et al. Influence of π-electronic charges on the chemical shifts of the meso-protons in β-ethoxycarbonyl-substituted porphyrins. Chem Heterocycl Compd 4, 685–686 (1971). https://doi.org/10.1007/BF00481060
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DOI: https://doi.org/10.1007/BF00481060