mirror CH3 CH3 *CuH uC9 CH3CH2 Br Br CH2CH3 Copyright2010 Pearson Prentice Hall,Inc. Enantiomers:Nonsuperimposable mirror images, different molecules with different properties
Enantiomers: Nonsuperimposable mirror images, different molecules with different properties
Chlorodifluoromethane is achiral The two structures are mirror images,but are not enantiomers,because they can be superposed on each other
Chlorodifluoromethane Chlorodifluoromethane is achiral achiral The two structures are mirror images, but are not enantiomers, because they can be superposed on each other
Chirality in Molecules The cis isomer is achiral. The trans isomer is chiral. Enantiomers:nonsuperimposable mirror images, different molecules. same compound different compounds CI H CI H cis-1,2-dichlorocyclopentane trans-1,2-dichlorocyclopentane (achiral) (chiral) Copyright 2010 Pearson Prentice Hall,Inc
Chirality in Molecules The cis isomer is achiral. The trans isomer is chiral. Enantiomers: nonsuperimposable mirror images, different molecules
Stereocenters Any atom at which the exchange of two groups yields a stereoisomer. Examples: >Asymmetric carbons >Double-bonded carbons in cis-trans isomers CH2CH3 CH2CH2CH3 CH2CH3 H30 Br CH(CH3)2 CH: asymmetric carbon chirality centers(*) stereocenters(circled) Copyright 2005 Pearson Prentice Hall,Inc
Stereocenters Any atom at which the exchange of two groups yields a stereoisomer. Examples: Asymmetric carbons Double-bonded carbons in cis-trans isomers
The Stereogenic Center a carbon atom with four different groups attached to it also called: Chiral center ■Asymmetric center Stereocenter
a carbon atom with four different groups attached to it also called: Chiral center Asymmetric center Stereocenter The Stereogenic Stereogenic Center w x y z C