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  Home > JCE Print > Journal of Chemical Education > Issues > 2007  > November  >
In the Classroom
Showing Enantiomorphous Crystals of Tartaric Acid
Julio Andrade-Gamboa
Área de Química, Centro Regional Universitario Bariloche, Universidad Nacional del Comahue and Centro Atómico Bariloche, Comisión Nacional de Energía Atómica, Río Negro, Argentina
Cover
November 2007
Vol. 84 No. 11
p. 1783
Abstract
Most of the articles and textbooks that show drawings of enantiomorphous crystals use an inadequate view to appreciate the fact that they are non-superimposable mirror images of one another. If a graphical presentation of crystal chirality is not evident, the main attribute of crystal enantiomorphism can not be recognized by students. The classic case of tartaric acid crystals is discussed and the use of an alternative graphical representation and a paper model is proposed to facilitate the conceptualization of this subject.
Supplement
An enlarged version of the paper model shown in Figure 3 is available.
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Citation
Andrade-Gamboa, Julio. J. Chem. Educ. 2007, 84, 1783.
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Keywords
Chirality / Optical Activity; Crystals / Crystallography; Enantiomers; Graduate Education / Research; Hands-On Learning / Manipulatives; Misconceptions / Discrepant Events; Organic Chemistry; Physical Chemistry; Second-Year Undergraduate; Stereochemistry; Upper-Division Undergraduate
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History
Created:
Last Updated:
9/19/2007
9/27/2007
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