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Chemistry
121, Winter 2008, LA Tech
Cis-Trans Isomerism
Dienes, trienes, and polyenes
•for an alkene with n carbon-carbon double bonds, each of which can show cis-trans
isomerism, 2n cis-trans isomers are possible
•consider 2,4-heptadiene; it has
four cis-trans isomers, two of which are drawn here
