## Three different two-dimensional "C-'H shift-correlation sequences which detect 'H chemical shifts and one bond '3C-'H[J(CH)I couplings in f, with full 'H-'H decoupling are described and evaluated. They are particularly useful for detecting small differences in 'J(CH) for nonquivalent methylene
Investigation of phase-sensitive 13C-detected 13C1H shift correlation sequences with partial and full 1H1H decoupling and partial spectral editing
✍ Scribed by Katharine A. Carpenter; William F. Reynolds
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 520 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
Several different versions of the ^13^C‐detected ^13^C^1^H shift correlation sequence in phase sensitive mode with partial and full ^1^H^1^H decoupling are described and evaluated. As expected, they show sensitivity advantages over their absolute value analogues. Further, it is possible partially to edit the 2D spectra since CH~2~ peaks are inverted relative to CH and CH~3~ peaks.
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## Abstract A mixture of two slowly interconverting isomeric compounds was isolated from __Bernardia laurentii__ and identified as the __trans__‐ and __cis‐p__‐hydroxycinnamoyl esters of the triterpene taraxerol. Their ^13^C and ^1^H NMR spectra were totally assigned with the aid of concerted two‐d