In recent years, organic chemists have appeared to treat 'H NMR data not cautiously. Before presenting 'H NMR data,' we must overcome the two tedious problems: (1) how to measure a peak position accurately, and (2) how to analyse a signal pattern. In fact, a description such as "8 4.38 (CHOH, t, J =
Novel substituent effects in 1H and 13C NMR spectra of 4-and 4'-substituted N-benzylideneanilines
β Scribed by N. Inamoto; K. Kushida; S. Masuda; H. Ohta; S. Satoh; Y. Tamura; K. Tokumaru; K. Tori; M. Yoshida
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- French
- Weight
- 212 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0040-4039
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Various 4-and 4'-substitued Pans-N-benzylideneanilines were synthesized and their 'H N M R spectra recorded at 30Β°C in DMSO-d, and acidic media (TFA-d and D1S04). The effects of substituents on the chemical shifts of H-a (proton on carbon of imme group) and H-2' (protons on benzaldehyde ring ortho t
a See footnote d in Table 1. 'H and "C NMR Spectra of 4 4 - ## Substituted Chalcones KIKUKO HAYAMIZU (to whom correspondence should be addressed), MASARU YANAGISAWA, TETSUKO ISHII,
The 1H and 13C NMR spectra of 4-substituted phenylthiol acetates, benzoates and cinnamates and the 17O NMR spectra of a few thiol acetates were measured. The 13C chemical shifts of C-1 of the thiol esters when correlated with appropriate substituent-induced chemical shifts (SCS) of monosubstituted b