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Carbon‐13 NMR data for methylated steroids
Magnetic Resonance in Chemistry, 1994AbstractCarbon‐13 chemical shifts of 40 methylated steroid derivatives are reported.
Meskó Eszter +3 more
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Carbon-13 NMR investigations on ribonuclease A
Biochimica et Biophysica Acta (BBA) - Protein Structure, 1979The proposed interaction between the amino acid residues Asp 14 and His 48 of ribonuclease A has been confirmed by 13C-NMR spectroscopy. The titration behaviour of the resonance of the side-chain carboxyl group of Asp 14 suggests a pKa of 6.5--7.0 for His 48. An equilibrium between different conformation process of His 48.
J, Santoro +2 more
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Carbon-13 NMR spectra of carbon-13 enriched chlorophylls a and b
Biochemical and Biophysical Research Communications, 1972Abstract The proton decoupled 13C NMR (CMR) spectra of chlorophylls a and b enriched to 90% 13C have been obtained at 25.2 MHz and, despite the complexity of the spectra, many of the assignments of the 13C resonances have been made.
C E, Strouse +2 more
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Journal of Macromolecular Science, Part C: Polymer Reviews, 1972
Abstract Recent advances in 13C NMR spectroscopy instrumentation are causing an almost-explosive flurry of activity in organic molecular structure studies. This is the most powerful molecular structure tool to come upon the scene since proton NMR, and it will undoubtedly surpass the latter in importance.
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Abstract Recent advances in 13C NMR spectroscopy instrumentation are causing an almost-explosive flurry of activity in organic molecular structure studies. This is the most powerful molecular structure tool to come upon the scene since proton NMR, and it will undoubtedly surpass the latter in importance.
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Carbon‐13 NMR spectra of cyclohexaneaminonitriles
Magnetic Resonance in Chemistry, 1988AbstractThe 13C NMR spectra of nine 1‐(N‐piperidino) cyclohexanenitriles and of 1‐dimethylaminocyclohexanenitrile have been recorded and assigned.
Muthiah Manoharan, Ernest L. Eliel
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Nature, 1980
Carbon-13 NMR Based Organic Spectral Problems. By Philip L. Fuchs and Charles B. Bunnell. Pp.316. (Wiley: New York and Chichester, UK, 1979.) Paperback $14.97, £7.55.
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Carbon-13 NMR Based Organic Spectral Problems. By Philip L. Fuchs and Charles B. Bunnell. Pp.316. (Wiley: New York and Chichester, UK, 1979.) Paperback $14.97, £7.55.
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1986
The chemical shift range of carbon-13 resonances is so wide (more than 200 ppm for simple functional classes) that most compounds show a separate signal for each different carbon environment in the molecule; this is dramatically illustrated in the spectrum for vitamin B12 at the head of the chapter, and more modestly in the menthol spectrum in figure 5.
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The chemical shift range of carbon-13 resonances is so wide (more than 200 ppm for simple functional classes) that most compounds show a separate signal for each different carbon environment in the molecule; this is dramatically illustrated in the spectrum for vitamin B12 at the head of the chapter, and more modestly in the menthol spectrum in figure 5.
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Carbon-13 NMR spectra of rifamycins
Tetrahedron, 1973Abstract The natural abundance 13 C Fourier transform magnetic resonance spectra of rifamycin S and some of its derivatives have been studied. A combination of five different approaches has made unambiguous assignments for most of the resonances possible: (1) comparative study of the non- decoupled and noise-decoupled spectra; (2) 13 C spectral ...
E. Martinelli +3 more
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Carbon‐13 NMR studies of benzoquinones
Organic Magnetic Resonance, 1981AbstractThe assignment of all ring carbons of p‐benzoquinones derived from perezone and from thymoquinone was completed using gated decoupled spectra. The long range proton‐carbon couplings are discussed in terms of the degree of substitution of the quinone ring.
P. Joseph‐Nathan +2 more
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