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Distinguishing Vinylic and Aromatic [superscript 1]H NMR Signals Using Selectively Deuterated Chalcones
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Gehman, Courtney A.; Hantz, Eric R.; Hamann, Christian S. – Journal of Chemical Education, 2021
[superscript 1]H NMR spectroscopy is a molecular characterization technique that is ubiquitously used in research and teaching laboratories alike. Strategic deuteration of molecules is a commonly employed technique in the deconvolution of [superscript 1]H NMR signals. Here this approach is applied in a second-year chemistry course in which…
Descriptors: Undergraduate Students, College Science, Chemistry, Science Experiments
Determining the Ibuprofen Concentration in Liquid-Filled Gelatin Capsules to Practice Collecting and Interpreting Experimental Data, and Evaluating the Methods and Accuracy of Quality Testing
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Wheate, Nial J.; Apps, Michael G.; Khalifa, Hazer; Doughty, Alan; Patel, Alpesh Ramanlal – Journal of Chemical Education, 2017
A laboratory experiment to determine the concentration of the anti-inflammatory drug ibuprofen in liquid gelatin capsule dosage forms, suitable for undergraduate chemistry or pharmacy students, is described. Either individually, or in small teams, the students digest two 200 mg capsules in a KOH solution. While the capsules are digesting the…
Descriptors: Science Instruction, Science Laboratories, Laboratory Experiments, Science Experiments