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25. Models in 3D Space (1869-1877); Optical Isomers

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Uploaded on Sep 18, 2009

Freshman Organic Chemistry (CHEM 125)

Despite cautions from their conservative elders, young chemists like Paternó and van't Hoff began interpreting molecular graphs in terms of the arrangement of a molecule's atoms in 3-dimensional space. Benzene was one such case, but still more significant was the prediction, based on puzzling isomerism involving "optical activity," that molecules could be "chiral," that is, right- or left-handed. Louis Pasteur effected the first artificial separation of racemic acid into tartaric acid and its mirror-image.

00:00 - Chapter 1. Venturing into 3-D Arrangements of a Molecule's Atoms
11:41 - Chapter 2. Exchanges between van't Hoff and Ladenburg on Aromaticity and Chirality
22:58 - Chapter 3. In-Class Observations and Experiments on Chirality
39:14 - Chapter 4. Louis Pasteur's Artificial Separation of Racemic Acid

Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses

This course was recorded in Fall 2008.

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