2_23 - 2/22/2010 Chapter 18 A chiral molecule is a molecule...

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2/22/2010 1 Chapter 18 Chiral molecules possess chiral centers in which four different substituents are attached to a central carbon atom. The different hands of chiral molecules can act differently in biological systems. A chiral molecule is a molecule whose mirror images are not superimposable.
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2/22/2010 2 D-epinepherine binds to the receptor at three points, whereas the biochemically weaker L- epinephrine binds only at two sites. Classifying Enantiomers and Diastereomers
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3 Fischer projection formulas - a method for giving molecular chirality specifications in two dimensions. A Fischer projection formula is a 2-D structural notation for showing the spatial arrangement of groups about chiral centers in molecules. D and L system used to designate the handedness. The four groups attached to the atom at the chiral center assume a tetrahedral geometry and it is governed by the following conventions Vertical lines from the chiral center represent bonds to groups directed into the printed page. Horizontal lines from the chiral center represent bonds
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2_23 - 2/22/2010 Chapter 18 A chiral molecule is a molecule...

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