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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.
"You're Repulsive!"Teaching VSEPR in a Not-So-Elegant WayRobert S. H. Liu Valence shell electron pair repulsive (VSEPR) interaction is an important concept particularly in discussing structural properties of molecules. In this article we showed five organic examples not commonly associated with VSEPR but yet all involving repulsive interactions of valence electrons, which provides ready explanations for altered chemical reactivity and spectroscopic properties of organic compounds. The ready catchy phrase Youre Repulsive! is the common thread used throughout these five examples. Liu, Robert S. H. J. Chem. Educ.2005, 82, 558.
Mechanisms of Reactions |
UV-Vis Spectroscopy |
Reactions |
Addition Reactions |
Electrophilic Substitution
The Evolution of a Green Chemistry Laboratory Experiment: Greener Brominations of StilbeneLallie C. McKenzie, Lauren M. Huffman, and James E. Hutchison We describe two new greener alkene bromination reactions that offer enhanced laboratory safety and convey important green chemistry concepts, in addition to illustrating the chemistry of alkenes. The two alternative reactions, one involving pyridinium tribromide and a second using hydrogen peroxide and hydrobromic acid, are compared to the traditional bromination of stilbene through the application of green metrics, including atom economy, percent experimental atom economy, E factor, and effective mass yield. McKenzie, Lallie C.; Huffman, Lauren M.; Hutchison, James E. J. Chem. Educ.2005, 82, 306.
Synthesis |
Green Chemistry |
Aromatic Compounds |
Addition Reactions |
Alkenes
The electrophilic addition to alkynesWeiss, Hilton M. Electrophilic additions to alkynes traditionally do not receive as much attention in organic textbooks as electrophilic addition to alkenes. Weiss, Hilton M. J. Chem. Educ.1993, 70, 873.
