## Abstract The ^13^C NMR chemical shifts of nine acetoxyxanthones are reported and identified. The acetoxy substituent effects have been evaluated and the corresponding shift increments proposed.
Microcomputer-based 13C NMR spectral simulation of substituted alkanes
✍ Scribed by R. Angus Hearmon
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 463 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
The empirical prediction of =C NMR chemical shifts using the Lindeman-Adams rules and substituent chemical shift parameters is a useful aid for the chemist in the interpretation of spectra. The program Alkanes, written in Basic for a desk-top microcomputer, automates the chemical shift estimation.
📜 SIMILAR VOLUMES
## Abstract A ^13^C NMR chemical shift prediction and spectral assessment program was written in Turbo Prolog. Based on the large data compendium of Ewing it allows the rapid assessment of the spectral–structural relationship for substituted benzene rings.
Solid-state I3C NMR spectra of "N-containing compounds obtained under CPMAS conditions often show asymmetric doublets arising from the unaveraged l3C,l4N residual dipolar coupling. A similar result has recently been noticed in deuteriated samples, whose "C resonances showed the combined effect of %,
## Abstract Detailed assignments of ^1^H and ^13^C NMR spectral data for 13 β‐substituted cycloenones are reported. The assignments are based on 1D ^1^H and ^13^C NMR and on 2D shift‐correlated (^1^H,^13^C‐HMQC and HMBC), __J__‐resolved and COSY and double irradiation experiments. Copyright © 2005
NMR chemical shifts of 1H, 13C, and 73Ge are reported for a series of monosubstituted aromatic trimethylgermanes of the type XC6H4Ge(CH3)3; X = p-N(CH3)2, p-OCH3, p-OC2H5, p-C(CH3)3, p-Si(CH3)3, p-Ge(CH3)3, p-Sn(CH3)3, p-CH3, m-CH3, -H, m-OCH3, p-Cl, p-Br, m-F, m-CF3, p-CF3, o-OCH3, and o-CH3. The r
## Abstract The proton and carbon spectra of new 2,4‐diaryl‐substituted cycloalkyl[__d__]pyrimidines prepared in a simple one‐pot reaction, are reported. Copyright © 2002 John Wiley & Sons, Ltd.