Alkenes EZ and EA rxns

Alkenes EZ and EA rxns - Alkenes: structure cis and trans...

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1 Alkenes: structure cis and trans for alkenes: 2 Alkene Isomers
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2 3 E and Z Nomenclature: , Zusammen (together) , Entgegen (opposite ) , is from German: 4 Naming by the , System Rule 1: Consider the atomic number of the atoms bonded directly to a specific sp 2 carbon: Higher atomic number has higher priority
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3 5 Rule 2: If there is a tie, consider the atoms attached to the tied atoms: Rule 3: Multiple bonds are treated as attachment of multiple single bonds using “divide-duplicate.” 6 Using divide-duplicate: Rule 4: Rank the priorities by mass number in isotopes: Divide π -bonds. Duplicate atoms attached to each π -bond.
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4 7 Electron-rich atoms or molecules (nucleophiles) are attracted to electron-deficient atoms or molecules (electrophiles): 8 Your First Reaction: Addition of HBr to an Alkene 1st Step: Addition of a proton to the alkene. The proton is the electrophile. 2nd Step: Bromide traps the carbocation.
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This note was uploaded on 03/01/2011 for the course CHEM 030.205 taught by Professor Klein during the Fall '09 term at Johns Hopkins.

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Alkenes EZ and EA rxns - Alkenes: structure cis and trans...

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