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Understandings:
Stereoisomers are subdivided into two classes—conformational isomers, which interconvert by rotation about a σ bond and configurational isomers that interconvert only by breaking and reforming a bond.
Configurational  isomers  are further subdivided  into cis-trans  and E/Z isomers and optical isomers.

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1. Define Isomer
2. Draw any 2 isomers you know
Extension:
Outline the two type of isomers

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Stereoisomerism is the arrangement of atoms in molecules whose connectivity remains the same but their arrangement in space is different in each isomer.

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Experiment on cis-trans isomers
1. Determination of the physical properties of Maleic and fumaric acid as well as some chemical properties (Part A)
a. Hashem - Thiora - Cristina

2. Conversion of maleic acid to fumaric acid (cis to trans) (Part B)
Groups:
Rest of the class

Note: In lab gaps, you will be exchanging and discussing both parts A and B.

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* Construct 3D Models of Conformational Isomers using Molymods