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 CH3 CH2CH3 H3 Br CH(CH3)2 asymmetric carbon chirality centers ( stereocenters(circled) Copyright2005 Pearson Prentice Hall,Inc. Chapter 5 5 Stereocenters • Any atom at which the exchange of two groups yields a stereoisomer. • Examples: • Asymmetric carbons • Double-bonded carbons in cis-trans isomers =>