CHM136H1 Chapter Notes - Chapter 5.4-5.5: Methylamine, Glyceraldehyde, Threonine
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CHM136H1 Full Course Notes
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Little was done to build on biot"s discovery of optical activity until. 1848, when louis pasteur began work on a study of crystalline tartaric acid salts derived from wine. Pasteur was far ahead of his time. Today, pasteur"s work would be described by saying that he had dextro tartaric acid] there exists an asymmetric arrangement having a nonsuperimposable image. It is no less certain that the atoms of the levo acid have precisely the inverse asymmetric years later that his ideas regarding the asymmetric carbon atom were confirmed. Enantiomers, also called optical isomers, have identical physical properties, such as melting point and boiling point, but differ in the direction in which their solutions rotate plane-polarized light discovered enantiomers. Having ranked the four groups attached to a chiral carbon, the stereochemical configurations around the carbons can be described by orienting the molecule so that the group with the lowest ranking (4) points directly away from the viewer.
