Table of Contents
International Journal of Spectroscopy
Volume 2010, Article ID 246821, 6 pages
Research Article

Styrylpyrylium Salts: 1 H and 1 3 C NMR High-Resolution Spectroscopy (1D and 2D)

Laboratoire de Chimie Organique : Structure et Réactivité, UFR/SEA, Université de Ouagadougou, 03 B.P. 7021, Ouagadougou 03, Burkina Faso

Received 28 December 2009; Revised 12 April 2010; Accepted 20 April 2010

Academic Editor: Karol Jackowski

Copyright © 2010 Jean Claude W. Ouédraogo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


1 H and 1 3 C NMR high-resolution spectroscopy (1D and 2D) ( 1 H , 1 H -COSY, HSQC, HMBC) for four styrylpyrylium perchlorates were carried out and signal attributions are reported. Chemical shifts observed on 1 3 C NMR spectra for the styrylpyrylium salts were compared with net atomic charge for carbon obtained by AM1 semiempirical calculations. The position of the styryl group present low effect on chemical shifts for carbon atoms, while the presence of methyl group led to the unshielding of the substituted carbon.