8/18/2019 Presentation1 Geometrical Isomers

1/14

Diastereomers: Cis-transIsomerism on Rings

• Cis-trans isomers are not mirror images, so th

are diastereomers.

8/18/2019 Presentation1 Geometrical Isomers

2/14

Diastereomers: Cis-trans IsomerisRings

• Cis-trans isomers are not mirror images, so thesdiastereomers.

Chapter 5 2

8/18/2019 Presentation1 Geometrical Isomers

3/14

8/18/2019 Presentation1 Geometrical Isomers

4/14

8/18/2019 Presentation1 Geometrical Isomers

5/14

8/18/2019 Presentation1 Geometrical Isomers

6/14

 Has no plane of symmetryand exist as a pair ofenantiomers

8/18/2019 Presentation1 Geometrical Isomers

7/14

St h i t f

8/18/2019 Presentation1 Geometrical Isomers

8/14

Stereochemistry ofalkenes

8/18/2019 Presentation1 Geometrical Isomers

9/14

Nomenclature

8/18/2019 Presentation1 Geometrical Isomers

10/14

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

8/18/2019 Presentation1 Geometrical Isomers

11/14

Cumulenes

8/18/2019 Presentation1 Geometrical Isomers

12/14

1,-dibromoethene

8/18/2019 Presentation1 Geometrical Isomers

13/14

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

8/18/2019 Presentation1 Geometrical Isomers

14/14

1,!-dibromo-1,#-pentadie