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1 H and 13 C NMR study of some ( E )‐3′‐and 4′substituted stilben‐4‐ols
Author(s) -
Fisher Thomas H.,
Schultz Tor P.
Publication year - 1991
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260290919
Subject(s) - chemistry , chemical shift , carbon 13 nmr , nmr spectra database , spectral line , interpretation (philosophy) , hydrogen , stereochemistry , organic chemistry , physics , astronomy , computer science , programming language
A series of ten ( E )‐stilben‐4‐ols, HOPhCHCHPhX, with X = H, 4′‐Cl, 4′‐F, 4′‐Me, 4′;‐OMe, 3′‐Me, 3′‐OMe, 3′‐OH, 3′‐F and 3′,4‐diOMe, were studied using one‐ and two‐dimensional NMR techniques. Interpretation of these spectra led to definitive assignments of all carbon and hydrogen chemical shifts. 1 H chemical shift increments were quantitatively determined for the five substituents studied, and the para A i value of the styryl group was found to be more deshielding than those recorded in previous reports.