𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The 1H NMR spectra of quinoline, quinoline N-oxide, the quinolinium ion and of their monomethyl derivatives

✍ Scribed by Giorgio Barbieri; Rois Benassi; Paolo Lazzeretti; Luisa Schenetti; Ferdinando Taddei

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
509 KB
Volume
7
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

^1^H chemical shifts of quinoline, quinoline N‐oxide and the quinolinium ion were obtained by complete analysis of their NMR spectra and interpreted critically in an attempt to quantify the possible different effects acting on the shielding constant of protons in these systems. Semi‐empirical SCF calculations of electron charge densities and ring current contributions were also performed. It was found that the same effects that act on the shielding of protons directly bonded to the heterocyclic system also act, in an attenuated form, on the proton chemical shift of methyl groups in monomethyl derivatives. Vicinal coupling constants were rationalised in terms of π‐electron bond order and electro‐negativity of neighbouring atoms.

📜 SIMILAR VOLUMES

Substituent effects of the N,N-dimethyl-
Substituent effects of the N,N-dimethyl- sulfamoyl group on the 1H and 13C NMR spectra of positional isomers of quinolines
✍ Andrzej Maślankiewicz; Maria J. Maślankiewicz; Krzysztof Marciniec 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 110 KB 👁 1 views

## Abstract The complete ^1^H and ^13^C NMR spectral assignments of seven positional isomers of __N__,__N__‐dimethylsulfamoylquinolines 2–8 and quinoline have been made using 1D and 2D NMR techniques, including COSY, HMQC and HMBC experiments. Δδ~H~ and Δδ~C~ substituent effects induced by the sulf

15N NMR spectra of some 3-substituted 4(
15N NMR spectra of some 3-substituted 4(1H)-quinolinones and their 1-methyl derivatives
✍ Andrzej Zięba; Andrzej Maślankiewicz; Viktor Milata; Jerzy Sitkowski 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 71 KB

## Abstract ^15^N NMR spectral data for 3‐substituted (chloro, bromo, acetyl, carboxy, carboethoxy, methylsulfanyl, methylsulfinyl, __N,N__‐dimethylsulfamoyl, nitro) 4(1__H__)‐quinolinones and their 1‐methyl derivatives are presented. Copyright © 2003 John Wiley & Sons, Ltd.

1H and 13C NMR spectra of the rotational
1H and 13C NMR spectra of the rotational isomers of N-hydroxymethylamides and derivatives
✍ E. N. Gate; D. L. Hooper; M. F. G. Stevens; M. D. Threadgill; K. Vaughan 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 563 KB

A series of N-hydroxymethylamides, RCONR'CH,OH, and their 0-methyl and 0-acetyl derivatives, have been studied by -C and 'H magnetic resonance spectroscopy. Signals have been assigned to the E and %isomers on the bask of the analysis of the fully coupled spectra, and by comparison of the chemical sh

Assignment of the 1H and 13C NMR spectra
Assignment of the 1H and 13C NMR spectra of naphtho [1′,2′:4,5]thieno[2,3-c]quinoline using two-dimensional NMR spectroscopy
✍ Lyle W. Castle; Andrew S. Zektzer; Milton D. Johnston Jr. 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 470 KB

## Abstract The ^1^H NMR spectrum of naphtho [1′,2′:4,5]thieno[2,3‐__c__]quinoline is highly congested because all the protons are in an aromatic environment, and the structure of the molecule is nearly symmetric. With this in mind, the assignment of the ^1^H and ^13^C NMR spectra of this compound