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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.
The Synthesis of N-Benzyl-2-azanorbornene via Aqueous Hetero Diels–Alder ReactionXavier Sauvage and Lionel Delaude Characterization of the product of this organic synthesis through IR and NMR data analysis provides valuable material to familiarize students with different types of protonproton coupling patterns and their typical ranges, serves to illustrate the concepts of green chemistry and atom efficiency, and can be used to exemplify structural analysis and computational studies. Sauvage, Xavier; Delaude, Lionel. J. Chem. Educ.2008, 85, 1538.
Alkenes |
Aqueous Solution Chemistry |
Conformational Analysis |
Green Chemistry |
IR Spectroscopy |
Molecular Modeling |
NMR Spectroscopy |
Stereochemistry |
Synthesis
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
Diels–Alder Synthesis of endo-cis-N-Phenylbicyclo[2.2.2]oct-5-en-2,3-dicarboximideMarsha R. Baar and Kristin Wustholz endo-cis-N-Phenylbicyclo[2.2.2]oct-5-en-2,3-dicarboximide was synthesized by a DielsAlder cycloaddition of 1,3-cyclohexadiene and N-phenylmaleimide in ethyl acetate. 1,3-Cyclohexadiene and N-phenylmaleimide were selected to illustrate the Alder rule, which reflects a preference for endo products and to overcome the difficulties associated with the traditional combination of 1,3-cyclopentadiene and maleic anhydride. Baar, Marsha R.; Wustholz, Kristin. J. Chem. Educ.2005, 82, 1393.
Interactive Molecular OrbitalsWilliam F. Coleman The majority of Introductory Chemistry texts provide students with an adequate introduction to the visual aspects of the molecular orbital model for homonuclear diatomic molecules. The treatment of heteronuclear diatomic and polyatomic molecules is less uniform. Heteronuclear diatomics, when mentioned, are invariably treated as being derived from homonuclear diatomics. While the atomic orbital energy level differences in heteronuclear diatomics is sometimes pictured, the consequences of those differences for the resultant molecular orbitals are rarely discussed. The discussion of polyatomic molecular orbitals in these texts is limited to showing that parallel p-orbitals produce delocalized pi molecular orbitals. The molecules typically mentioned in this context are benzene, nitrate ion and carbonate ion. However, It is rarely pointed out that the six p-orbitals in benzene would form 6 pi molecular orbitals, and that only one of these orbitals would look like the picture in the text.These interactive modules are designed to clarify this subject.
MO Theory
Molecular OrbitalsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
MO Theory |
Magnetic Properties
Delocalized ElectronsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
