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1 H NMR spectra and electronic structure of 3‐arylmethyl‐idenephthalide and 3‐arylthiomethylidenephthalide derivatives
Author(s) -
Vida M.,
Kellö V.,
Liptaj T.,
Perjéssy A.,
Hrnčiar P.,
Lácová M.
Publication year - 1974
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/mrc.1270060710
Subject(s) - heteroatom , chemistry , ring (chemistry) , chemical shift , molecule , nmr spectra database , spectral line , crystallography , group (periodic table) , electronic effect , stereochemistry , computational chemistry , organic chemistry , physics , steric effects , astronomy
The 1 H NMR spectra of trans ‐3‐phenylmethylidenephthalide and trans ‐3‐phenylthiomethylidenephthalide derivatives were investigated. After applying a correction for the anisotropy of substituents and/or for changes of ring current in the substituted aromatic ring, linear correlations were obtained between the chemical shifts of protons of the substituted phenyl group and the methine group and s̀ constants of substituents. The influence of the bridge heteroatom on the transfer of electronic effects of substituents through the molecules under study is discussed.