𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Analysis of the carbon and proton NMR spectra of 2-arylthiophenes and related heterocycles

✍ Scribed by Dario Del Mazza; Manfred G. Reinecke; William B. Smith

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
288 KB
Volume
27
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Complete proton and carbon NMR assignments were made for five 2-(2X-pbenyl)thiophenes (X = NH, , NO,, COOH, Br), four 2,5diphenylbeterocycles (thiophene, furan and N-methyl-and N-phenylpyrrole) and Nphenylpyrrole using HETCOR, COSY, XCORFE and, in one case, NOESY 2D NMR techniques. In the first set of compounds a good correlation was found between the chemical shifts of certain carbon atoms and up and/or the Q-parameter. In the second series the expected correlation with the aromatic character of the heterocycle was observed primarily with the furan compound, where the heterocyclic ring strongly increases the electron density of the phenyl rings.

📜 SIMILAR VOLUMES

Proton resonance spectra of heterocycles
Proton resonance spectra of heterocycles—VII: Proton NMR spectra of 2-methyl-benzoxazoles,-benzothiazoles and -benzoselenazoles
✍ A. R. Katritzky; Yoshito Takeuchi 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 366 KB

## Abstract Chemical shifts and coupling constants are reported for a series of the title compounds and the effects of substituents on these values correlated with the corresponding effects in benzenes. Partial bond fixation in these and other benzo‐heterocycles is discussed together with the gener

Carbon-13 NMR spectra of heterocycles. S
Carbon-13 NMR spectra of heterocycles. Sultones and sultams.
✍ M. Kausch; H. Dürr; S. H. Doss 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 303 KB

## Abstract The ^13^C NMR spectra of 1,3‐propanesultam, 2,4‐butanesultam, 1,4‐butanesultam, 1,3‐propanesultone and 1,4‐butanesultone, as well as some of their unsaturated analogs 2,4‐dimethylbuta‐1,3‐diene‐1,4‐sultone and 2,4‐dimethylbuta‐1,3‐diene‐1,4‐sultam, have been recorded. The observed chemi

Proton and carbon NMR spectra of 4-subst
Proton and carbon NMR spectra of 4-substituted 1-acetylnaphthalenes
✍ S. Perumal; G. Vasuki; D. A. Wilson 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 350 KB

## Abstract The proton and carbon spectra of ten 4‐X‐l‐acetylnaphthalenes have been assigned. Shift correlations have been made with benzene substituent‐induced chemical shifts (SCS, Lynch plots) and with dual substituent parameters (DSP) in the manner successfully done for many series of 1,4‐disub

Proton-coupled carbon-13 NMR spectra of
Proton-coupled carbon-13 NMR spectra of butadienes
✍ Robin K. Harris; Soon Ng; Alan Connelly 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 434 KB 👁 1 views

## Abstract Proton‐coupled ^13^C NMR spectra were obtained for three methyl‐substituted butadienes, namely 2‐methylbuta‐1,3‐diene, __trans__‐2‐methylpenta‐1,3‐diene and 2,4‐dimethylpenta‐1,3‐diene. The second‐order spectra were analysed by computer, using some new ^1^H NMR data, and the resulting c

Carbon-13 NMR spectra of tembamide, aege
Carbon-13 NMR spectra of tembamide, aegeline and related amides
✍ Amarendra Patra; Alok K. Mitra; Arundhati Ghosh; Prabir K. Mukhopadhyay 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 186 KB

## Abstract Carbon‐13 NMR spectral studies of tembamide (1) and aegeline (2), constituents of __Fagara hyemalis__ and __Aegle marmelos__ respectively, and a series of their structurally related amides (3–13) have been carried out. The assignment of the resonances of two related dimers are also repo