Ch_322a_5.01

Ch_322a_5.01 - enantiomers and diastereomers . Enantiomers...

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Chapter 5 Stereochemistry: Chiral Molecules Isomerism: Constitutional Isomers and Stereoisomers Isomers are different structures with the same molecular formula. Constitutional isomers , already examined, are isomers with different bond connectivities . Examples of Constitutional Isomers formula constitutional isomers C 3 H 8 O CH 3 CH 2 CH 2 OH CH 3 CHCH 3 OH C 4 H 10 CH 3 CH 2 CH 2 CH 3 CH 3 CHCH 3 CH 3
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Stereoisomers Stereoisomers are not constitutional isomers. They have the same general atom connectivity, but they differ in the arrangement of atoms in space . The cis - trans isomers of alkenes and cycloalkanes are examples of stereoisomers. Examples of Stereoisomers C=C CH 3 CH 3 H H C=C CH 3 CH 3 H H 2-butene cis trans Cl Cl H H Cl Cl H H 1,2-dichlorocyclopropane cis trans
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Enantiomers and Diastereomers Stereoisomers are divided into two general categories:
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Unformatted text preview: enantiomers and diastereomers . Enantiomers are stereoisomers that are mirror image related , and are not superimposable upon oneanother . Diastereomers are stereoisomers that are not enantiomers . They are not mirror images of oneanother. ISOMERS (different compounds with the same formula) CONSTITUTIONAL ISOMERS STEREOISOMERS (different atom connectivities) (same atom connectivities, different arrangement in space) ENANTIOMERS DIASTEREOMERS (mirror images, not superimposable) (not mirror image isomers) Conformational stereoisomers , an additional type of stereoisomer, interconvert by rotations around bonds and are further classified as conformational diastereomers or conformational enantiomers ....
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This note was uploaded on 07/22/2009 for the course CHEM 322AL taught by Professor Jung during the Summer '07 term at USC.

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Ch_322a_5.01 - enantiomers and diastereomers . Enantiomers...

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