## Carbon -13 NMR chemical shifts of a series of a-monosubstituted N,N-diethylacetamides [YCH,C(O)NEt, , Y = Me, C1, Br, I, OMe, SMe, and NMe,] are reported. The a-methylene and carbonyl carbon chemical shifts are correlated with the Pauling electronegativities (E,) and Charton's localized electri
13C NMR chemical shift assignments of N-monosubstituted and N,N-disubstituted 3-aminopyrroles
✍ Scribed by Andreas Rolfs; Clemens Mügge; Jürgen Liebscher
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 318 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
^13^C NMR chemical shift assignments of 47 N‐mono‐ and N,N‐disubstituted 3‐aminopyrroles with hydrogen or methyl in the 5‐position are reported. Substituents in the 2‐position are electron withdrawing such as alkoxycarbonyl, cyano or acyl in most cases and those in the 4‐position are aryl or ethoxycarbonyl.
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## Abstract The ^13^C NMR spectra of a series of 2‐(__n__‐butylthiomethylene) cycloalkanones and 2‐(__n__‐butylthiomethylene) 1‐decalones were recorded and unequivocally assigned by the study of correlation signals in DQCOSY and HETCOR experiments. The effect caused by the introduction of the __n__
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## Reference Data 13C NMR Chemical Shifts of N u nsubstituted-and N-MethyI-Pyramle Derivatives 13C shielding data for 100 derivatives of pyrazole are reported. These include methyl, ethyl, n-propyl, tert-butyl, phenyl, hydroxymethyl, carboxyl, ethoxycarbonyl, cyano. amino, hydrazino, nitro, azido,
The 170, 15N and =C NMR chemical shifts have been determined for N,N-dimethylmethanesulphinamide (l), both as the neat liquid and in dimethyl sulphoxide, acetone, chloroform and various alcohols. The 0 and 15N nuclei of 1 resonate at a lower frequency than those of the corresponding sulphonamide, an