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Diastereomers: Cis-transIsomerism on Rings
• Cis-trans isomers are not mirror images, so th
are diastereomers.
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Diastereomers: Cis-trans IsomerisRings
• Cis-trans isomers are not mirror images, so thesdiastereomers.
Chapter 5 2
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Has no plane of symmetryand exist as a pair ofenantiomers
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St h i t f
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Stereochemistry ofalkenes
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Nomenclature
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ans be dened to mean that it is on the alkoxide or thioalkoxide is on the sathe other end of the other end of double bond, and trans be dened to mea
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Cumulenes
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1,-dibromoethene
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n number of conjugated or isolated double bon
will be 2n geometrical isomers provided
substitutes are different; if some some
substituents are identical, isomer number decrea
1-bromo-!-"hloro-1,#-pentadiene
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1,!-dibromo-1,#-pentadie