Magnetic Resonance in Chemistry p. 755 - 757 (1995)
Update date:2022-08-04
Topics:
Sveshnikov, Nikolay N.
Nikulin, Victor I.
A study of the 1H and 13C NMR spectra of a series of E,E- and Z,E-isomers of 3-(arylpropenylidene)isobenzofuran-1(3H)-ones <1a-d and 2a-d, respectively> was carried out.The E,E- and Z,E-isomers 1a-d and 2a-d were recognized by the local anisotropy effect of the double and triple bonds of the substituents experienced by H-4 in E,E-isomers; in Z,E-isomers, in contrast to their E,E-analogues, upfield shifts of C-4 and C-8 due to the H-H γ-cis effect were observed. - Keywords: NMR; 1H NMR; 13C NMR; 3-(arylpropenylidene)isobenzofuran-1(3H)-ones; stereoisomers
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