Chemistry 2010 Infrared Spectroscopy Practice Match each of the compounds 1 through 6 below to the appropriate infrared spectrum, a through f. Somre of the compounds might have lR spectra that are very similar, that is, they might be indistinguishable by IR. In that case. Institute of Technology and Standards Chemistry Webbook: 1) toluene: 2) phenylmethand. 3) penzoic acid benzyl aicohol