25.5. Applying Spectroscopic Methods to Qualitative Organic Analysis
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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.
NMR and IR Spectroscopy for the Structural Characterization of Edible Fats and OilsMolly W. Crowther This article describes an upper-level instrumental laboratory for undergraduates that explores the complementary nature of IR and NMR spectroscopy in the analysis of five edible and structurally similar fats and oils for average chain length, degree of unsaturation, and trans fat content. Crowther, Molly W. J. Chem. Educ.2008, 85, 1550.
ATR–FTIR Spectroscopy in the Undergraduate Chemistry LaboratoryJennifer D. Schuttlefield and Vicki H. Grassian Presents several examples of the use of attenuated total reflectance-Fourier transform infrared spectroscopy in the undergraduate chemistry laboratory, including measuring the infrared spectra of solid and liquid organic compounds commonly used as unknowns and of inorganic solids synthesized by students. Schuttlefield, Jennifer D.; Grassian, Vicki H. J. Chem. Educ.2008, 85, 279.
SpecScan; A Utility Program for Generating Numerical Data from Printed Forms of SpectraConstantinos E. Efstathiou Obtaining digital data from analog figures is made much easier using this Windows utility. After scanning and touching-up a figure, you can import it into SpecScan to obtain X-Y data, which can then be exported to Excel or other program for additional processing.
Spectroscopy
3D NormalModes Shockwave; A Web Application for Interactive Visualization and Three Dimensional PercNickolas D. Charistos, C. A. Tsipis, Michael P. Sigalas 3D Normal Modes is a Web application for interactive visualization and three-dimensional perception of the normal modes of molecular vibration, suitable for undergraduate students in chemistry. The application uses the Macromedia Shockwave plug-in and has been designed and developed especially for the Web. It has a simple graphical user interface and requires a download of only 120 KB, allowing it to be used even with low bandwidth Internet connections. Its performance is comparable to a desktop application.
IR Spectroscopy |
Raman Spectroscopy
Atomic Spectra and the Bohr TheoryEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
