## Abstract Proton‐coupled and noise‐decoupled ^13^C NMR spectra of 1‐azulenecarbaldehyde, 1‐acetylazulene and 1,3‐azulenedicarbaldehyde have been studied, and complete assignments have been made based on the ^13^C^1^H coupling constants, additivity of substituent effects (SIS), and previous assig
NMR studies of structure and conformation in some highly substituted cyclohexenes. II. 13C NMR studies
✍ Scribed by B.L Shapiro; M.D Johnston Jr.; C.A Reilly
- Publisher
- Elsevier Science
- Year
- 1973
- Weight
- 651 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0022-2364
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
Two series of 2,4,6-tris(amino)-s-triazines were studied by 1 H and 13 C NMR. 15 N NMR had previously demonstrated hindered rotation of the acyclic amino substituents (NHallyl, NHpropyl) around the Ar -N bonds at room temperature. In the present work, 1 H and 13 C NMR studies showed that rotation is
The 13C NMR spectra of some 1and 2-substituted perimidines and perimidinium salts are discussed and assigned. Although the spectra of most of the 2-substituted perimidines are comparatively simple, several examples display I3C and 'H spectral characteristics indicative of inhibition of prototropic t
The 'H and the noise-decoupled =C NMR spectra of isochromane and 13 of its methyl-substituted derivatives were recorded and analysed. The collected data were used to assign the configurations and to determine the position of the conformational equilibria based on the vicinal ' I 3 coupling constants
## Abstract The ^13^C chemical shifts and one‐bond carbon‐hydrogen coupling constants have been obtained for some hydroxycoumarins and their corresponding acetoxy and methoxy derivatives. The changes in the one‐bond carbon‐hydrogen coupling constants resulting from the conversion of a hydroxy group
## Abstract The ^13^C NMR spectra of eight triterpenes are recorded and all carbon shifts have been assigned. The data are in agreement with the structures assigned to the rare lupanediol, lup‐20(29)‐ene‐3α,23‐diol, and other lupane triterpenes isolated from the Sri Lankan __Glochidion__ species (E