## Abstract In the acetylenic aldehyde oximes with substituents containing silicon and germanium, the ^13^C NMR signal of the Cβ2 carbon of triple bond is shifted by 3.5 ppm to lower frequency and that of the Cβ3 carbon is moved by 7 ppm to higher frequency on going from E to Z isomer. A greater lo
Conformation Analysis of Carotenoids in the Purple Bacterium Rhodobium marinum Based on NMR Spectroscopy and AM1 Calculation
β Scribed by Qian, P.; Mizoguchi, T.; Fujii, R.; Hara, K.
- Book ID
- 126454659
- Publisher
- American Chemical Society
- Year
- 2002
- Tongue
- English
- Weight
- 375 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0095-2338
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π SIMILAR VOLUMES
## Abstract The ^1^H, ^13^C and ^15^N NMR studies have shown that the __E__ and __Z__ isomers of pyrroleβ2βcarbaldehyde oxime adopt preferable conformation with the __syn__ orientation of the oxime group with respect to the pyrrole ring. The __syn__ conformation of __E__ and __Z__ isomers of pyrrol
## Abstract The preferred conformations of the methylsulphinyl group in a number of phenyl methyl sulphoxides substituted in the phenyl ring with one, two or three fluorine atoms have been studied by employing a multinuclear NMR approach. From the ^1^H, ^13^C and ^17^O chemical shifts of the methyl
## Abstract The Nο£ΏHΔbondX (X = N,O,S) intramolecular hydrogen bond in the series of 2(2β²βheteroaryl)pyrroles and their trifluoroacetyl derivatives is examined by the ^1^H, ^13^C, ^15^N spectroscopy and density functional theory (DFT) calculations. The influence of the hydrogen bond on coupling and