CHEM 212 Lecture 5

CHEM 212 Lecture 5 - 9/14/2009 ORGANIC CHEMISTRY 212 Youla...

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9/14/2009 1 ORGANIC CHEMISTRY 212 Youla S. TSANTRIZOS Office: Chemistry Department Email: youla.tsantrizos@mcgill.ca ORGANIC CHEMISTRY 212 Chapter 4: - Nomenclature - Conformations / 3D Geometry of Alkanes / Alkenes - Conformation of Cycloalkanes
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9/14/2009 2 Nomenclature of Alkenes: cis / trans π π H H H H Nomenclature of Alkenes: cis / trans π π
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9/14/2009 3 Nomenclature of Alkenes: cis / trans Rotation around the double bond is forbidden cis Geometry represents two identical substituents on the same side of the double bond trans Geometry represents two identical substituents on opposite sides of the double bond Nomenclature of Alkenes: cis / trans trans -2-Butene cis -2-Butene
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9/14/2009 4 Nomenclature of Alkenes: cis / trans Atomic priority is assigned to the two groups attached to the same carbon; priority is based on atomic number Priority is based on the fist point of difference 1 st priority 1 st priority Nomenclature of Alkenes: cis / trans Z (Zusammen) when the geometry represents the two 1 st
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CHEM 212 Lecture 5 - 9/14/2009 ORGANIC CHEMISTRY 212 Youla...

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