Transcription of Stereochemistry: an introduction - UCLA
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Stereochemistry: an introduction - UCLA
stereochemistry : an introduction Chem 30A fall 2002. Grazia Piizzi, Steve Hardinger stereochemistry of Tetrahedral Carbons We need: one Carbon sp3-hybridized, at least to represent molecules as 3D objects For example: H. H 2D drawing H C Cl H C Cl Not appropriate for Stereochem Br Br H H. 3D drawing C. H Cl H Cl Appropriate for Stereochem Br Br 2. Let's consider some molecules . First pair H Br same molecular formula (CH2 BrCl). same atom connectivity H H. Br Cl H superposable Cl A B identical (same compound). Second pair H F same molecular formula (CHFBrCl). same atom connectivity F Cl H Cl nonsuperposable Br Br C D stereoisomers (two different compounds). 3. Thus, we can define . Stereoisomers: Stereoisomers isomers that have same formula and connectivity but differ in the position of the atoms in space stereochemistry : stereochemistry chemistry that studies the properties of stereoisomers 4.
Stereochemistry: an introduction Chem 30A Fall 2002 Grazia Piizzi, Steve Hardinger
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