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Electronegativity and linear electric field effect on γ‐ anti 13 C chemical shifts
Author(s) -
Duddeck Helmut,
Islam Md. Rabiul
Publication year - 1983
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/omr.1270211205
Subject(s) - electronegativity , polarizability , electric field , substituent , electromagnetic shielding , shielding effect , chemistry , field (mathematics) , atomic physics , computational chemistry , crystallography , physics , stereochemistry , molecule , quantum mechanics , organic chemistry , mathematics , pure mathematics
The contribution from the existence of a 1,3‐diaxial H‐α ⃛H‐γ arrangement to the γ‐ anti effects of substituents X , which was previously believed to be generally shielding, is shown to be extremely dependent on the electronegativity of substituent X. In the presence of axial γ‐substituents Y, linear electric field effects appear to play a significant role if the C‐γ—Y bond is highly polarizable.