RETRACTED: Experimental FT-IR, FT-Raman spectra and quantum chemical studies of optimized molecular structures, conformers and vibrational characteristics of nicotinic acid and thio-nicotinic acid

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the Editor-in-Chief.This article has been retracted because the authors have copied several parts of the following already published paper without permission of the authors: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 79, Issue 5, September 2011, Pages 1316–1325. http://dx.doi.org/10.1016/j.saa.2011.04.062.