Top Representations Chemists have developed advanced written notations to convey the structure of molecules. Although the symbolism represents only the connectivity of the atoms, these impoverished representations imply the specific geometry of the molecule. Representations trains students to relate the notation of the impoverished drawing with the richness of the three dimensional structure of the molecule. Random presentation of a variety of impoverished drawings, typical of textbooks, are compared with three-dimensional models of rotating molecules drawn using advanced lighting and rendering techniques. The models may be correct or may include logical but incorrect interpretations of the drawing.
Students identify the accuracy of the model and receive corrective feedback if appropriate.
This site was established to provide chemistry students with NMR spectral problems. Interpretation of NMR spectra is a technique that requires practice - this site provides 1H NMR and 13C NMR spectra of different compounds for students to interpret. Hopefully, these problems will provide a useful resource to better understand NMR spectroscopy. This project is supported by Cambridge Isotope Laboratories, the UCLA Department of Chemistry and Biochemistry, and the UCLA Science Challenge.