The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 19
(2014) pp 241-246
Investigation of 1H NMR Chemical Shift in Various Systems: A Set of Advanced 1D 1H NMR Undergraduate Laboratory Projects
Laurie A. Witucki, William R. Winchester and Shannon M. Biros*
Department of Chemistry, Grand Valley State University, Allendale, MI 49401, email@example.com
Published: 20 July 2014
Abstract. A set of five advanced undergraduate experiments teaching specialized 1D 1H NMR topics is presented. The organization of these laboratory projects is such that students carry out one experiment then teach the concepts covered to the rest of the class through brief oral presentations of their data. Student learning is assessed through a written report where students must analyze and explain all five experiments. With this arrangement, five distinct topics in 1H NMR are covered in depth in one or two laboratory meetings, compared to five separate sessions. The projects contained here illustrate the interpretation of spectra from compounds with exchangeable protons, intramolecular hydrogen bonding, keto-enol tautomers and the use of lanthanide shift reagents. References to supplemental experiments are included so instructors can select the experiments and depth of analysis based on laboratory time, NMR instrumentation, student background and class size.
Key Words: Laboratories and Demonstrations; organic chemistry; NMR Spectroscopy; hands-on/active learning; lanthanide shift Reagent (LSR); exchangeable hydrogens; keto-enol tautomerism
(*) Corresponding author. (E-mail: firstname.lastname@example.org)
Procedures for student experiments, sample lab reports, notes for the instructor, and copies of all 1H NMR spectra are available (2.72 MB).