Nomenclature OF Alkenes CnH2n

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Nomenclature OF Alkenes (CnH2n)
1-butene 2-butene
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Nomenclature OF Alkenes
(CnH2n) 4-methyl-2-pentene 3-methyl-3-heptene

4-pentoxy-1-butene
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Nomenclature OF Alkenes (CnH2n)
5-bromo-4-chloro-1-heptene 2,5-dimethyl-4-octane
2-bromo-2-methyl-3-hexene
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Nomenclature OF Alkenes (CnH2n)

• In cyclic compounds no need to denote a
• number for the position of the functional
  group
• b/c the ring always numbered so that the
• double bond is between carbons 1 and 2

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CH2CH3
1
3
4
5
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The Structure of Alkenes
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Cis-Trans Isomerism
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The E, Z System of Nomenclature
Which isomer is cis and which is trans?
C C C C
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The E, Z System of Nomenclature
Cl (CH3)2CH ClCH2
(CH3)2CH
C C C
C
ClCH2 CH2CH3 Cl
CH3CH2
(z)-1,2-dichloro-3-ethyl-4-methyl-2-pentene

(E)-1,2-dichloro-3-ethyl-4-methyl-
2-pentene
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The E, Z System of Nomenclature
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The E, Z System of Nomenclature
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Reactivity Consideration
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Electrophilic Addition
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Thermodynamics and Kinetics
Reaction Coordinate Diagrams
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DGo DHo - DSo
Keq - R T ln Keq
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The Structure of The Transition State
Hammond postulate The transition state will be
more similar in structure to the species that it
is more similar in energy.
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Regioselectivity of Electrophilic Addition
Markovnikovs Rule
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Regioselectivity of Electrophilic Addition
Markovnikovs Rule
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Addition of Water and Alcohols
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Rearrangment of Carbocations
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Rearrangment of Carbocations
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Addition of Halogens
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Oxymercuration-Demercuration
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Addition of Borane Hydroborration-Oxidation
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