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Diels-Alder Visualization Several computer animations of a Diels-Alder reaction that were created as an undergraduate student project are presented.
Addition Reactions |
Alkenes
Addition Reactions of Alkenes The Diels-Alder reaction, addition of oxygen to tetrakis(N, N-dimethylamino) ethylene, polymerization of ethylene, and addition of iodine to a-pinene are demonstrated. Molecular models of ethene are shown.
Photochemical Dimerization of Dibenzylideneacetone. A Convenient Exercise in [2+2] Cycloaddition Using Chemical Ionization Mass SpectrometryG. Nageswara Rao, Chelli Janardhana, V. Ramanathan, T. Rajesh, and P. Harish Kumar Presents a laboratory procedure for the photochemical dimerization of dibenzylideneacetone, a dienone. The dimerization is confirmed by chemical ionization mass spectrometry, and other spectroscopic techniques are used to establish the structure of the product. Rao, G. Nageswara; Janardhana, Chelli; Ramanathan, V.; Rajesh, T.; Kumar, P. Harish. J. Chem. Educ.2006, 83, 1667.
Aldehydes / Ketones |
Alkenes |
Chromatography |
IR Spectroscopy |
Mass Spectrometry |
NMR Spectroscopy |
Photochemistry |
Thin Layer Chromatography
Ozonolysis Problems That Promote Student ReasoningRay A. Gross Jr. The structural features inherent in acyclic monoterpenes that follow the isoprene rule often lead to unique sets of ozonolysis products from which their structures, excluding stereochemistry, can be determined from molecular formulas only. This article shows how students may elucidate the structures of these compounds by analysis of the oxidative and reductive workup products. Gross, Ray A., Jr. J. Chem. Educ.2006, 83, 604.
Aldehydes / Ketones |
Alkenes |
Alkynes |
Carboxylic Acids |
Oxidation / Reduction |
Student-Centered Learning
A History of the Double-Bond RuleBernard E. Hoogenboom From his experience as an industrial chemist, Otto Schmidt recognized the bond weakening in hydrocarbons and in 1932 postulated the "Double-Bond Rule," stating that the presence of a double bond in a hydrocarbon has an alternating strengthening and weakening effect on single bonds throughout the molecule, diminishing with distance from the double bond. Hoogenboom, Bernard E. J. Chem. Educ.1998, 75, 596.
