Next Article in Journal
Dehydration of Aromatic Heterocyclic Carboxamides to Aromatic Heterocyclic Carbonitriles
Previous Article in Journal
Chemical Composition of the Essential Oil of Hyptis Suaveolens
Molecules 1997, 2(11), 169-175; doi:10.3390/21100169
Article

Experimental Studies on the UV-Spectra of Several Substituted Pyridine N-Oxides and Conjugated Cationic Acids in Acetonitrile

Department of Chemistry, University of Gdansk, Sobieskiego 18, 80-952 Gdansk, Poland
Received: 2 June 1997 / Accepted: 24 August 1997 / Published: 15 November 1997
Download PDF [31 KB, uploaded 18 June 2014]

Abstract

The ultraviolet spectra of heterocyclic N-oxides of pyridine N-oxide series and the conjugated cationic acids (simple cations of protonated N-oxides) in acetonitrile as the representative of polar aprotic solvents, were determined. The obtained spectra of N-oxides studied (mainly tri-substituted pyridine N-oxides) and their cations obtained by the protonation of free N-oxides by the excess of perchloric acid, have been collected and discussed. Taking into account the spectroscopic results, a scheme of acid-base equilibria in polar aprotic solvents has been discussed. The influence of the traces of water on acid-base equilibria in nonaqueous media has been stressed.
Keywords: UV spectra; pyridine N-oxides; cationic acids; perchloric acid; acetonitrile UV spectra; pyridine N-oxides; cationic acids; perchloric acid; acetonitrile
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
SciFeed

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Chmurzynski, L. Experimental Studies on the UV-Spectra of Several Substituted Pyridine N-Oxides and Conjugated Cationic Acids in Acetonitrile. Molecules 1997, 2, 169-175.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert