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Hydrogen Balloon Explosions Balloons containing various substances and hydrogen are exploded, revealing characteristic flame colors. In all cases except one, the substance had been mixed with methanol and water.
Descriptive Chemistry |
Spectroscopy
Spectroscope The use of a hand-held spectroscope is demonstrated.
Borohydride Reduction of EstroneAnimesh Aditya, David E. Nichols, and G. Marc Loudon This experiment presents a guided-inquiry approach to the demonstration of diastereoselectivity using chiral hindered ketones that undergo facile reduction with sodium borohydride. The resulting diastereomeric estradiols can be analyzed and differentiated by thin-layer chromatography and melting point. Aditya, Animesh; Nichols, David E.; Loudon, G. Marc. J. Chem. Educ.2008, 85, 1535.
Aldehydes / Ketones |
Diastereomers |
IR Spectroscopy |
Microscale Lab |
Stereochemistry |
Steroids |
Thin Layer Chromatography
A One-Pot, Asymmetric Robinson Annulation in the Organic Chemistry Majors LaboratoryKiel E. Lazarski, Alan A. Rich, and Cheryl M. Mascarenhas Describes a one-pot, enantioselective, Robinson annulation geared towards the second-year organic chemistry major and demonstrating aspects of green chemistry. Lazarski, Kiel E.; Rich, Alan A.; Mascarenhas, Cheryl M. J. Chem. Educ.2008, 85, 1531.
Aldehydes / Ketones |
Asymmetric Synthesis |
Catalysis |
Chirality / Optical Activity |
Gas Chromatography |
HPLC |
NMR Spectroscopy |
Synthesis |
Green Chemistry
Quantitative Analysis of Nail Polish Remover Using Nuclear Magnetic Resonance Spectroscopy RevisitedMarkus M. Hoffmann, Joshua T. Caccamis, Mark P. Heitz, and Kenneth D. Schlecht Substantial modifications intended for a second- or third-year laboratory course in analytical chemistry are presented for a previously described procedure using NMR spectroscopy to quantitatively determine analytes in commercial nail polish remover. The revised experiment introduces student collaboration to critically interpret a relatively large set of data. Hoffmann, Markus M.; Caccamis, Joshua T.; Heitz, Mark P.; Schlecht, Kenneth D. J. Chem. Educ.2008, 85, 1421.
