Inquiry-Based IR-Spectroscopy Activity Using iSpartan or Spartan for Introductory-Organic-Chemistry Students

An inquiry-based activity is described in which organic-chemistry students explore how IR radiation impacts functional-group-bond movements. Through the iSpartan and Spartan apps, students calculate the IR spectra for select organic compounds and manipulate the resulting 3D models and IR spectra to visualize bond vibrations. After developing an IR-frequency chart on the basis of these observations, the students analyze spectral data for the presence of functional groups. The results showed that students successfully prepared the chart and analyzed IR-spectral data without previous experience with IR spectroscopy or instructor intervention. Student responses to the inquiry-based learning activity were favorable. This activity was implemented at three academic institutions over a 4 year period and is an attractive approach for students to explore IR spectroscopy in a nonthreatening environment.