Drill: Name the following:. Alkenes Hydrocarbons with at least one double bond.

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Presentation transcript:

Drill: Name the following:

Alkenes

Hydrocarbons with at least one double bond

Alkenes Each double bond reduces the number of hydrogens in the hydrocarbon by two

Alkenes All alkenes are unsaturated hydrocarbons

Unsaturated Hydrocarbons Contain less than the maximum number of hydrogens

Alkenes

Naming Alkenes Number the carbons on the chain; so that, the double bond has the lowest possible number

Naming Alkenes The double bond will always fall between two numbered carbons

Naming Alkenes Apply the lower of those two numbers to the double bond

Naming Alkenes butene or Buta-2-ene

Problems

Geometric Isomers

Isomers whose arrangement is same side (cis) or opposite side (trans) of a stationary bond

Naming Alkenes Draw a line through the double bond parallel to each of the bonds in the double bond

Naming Alkenes

If the two ends of the chain are on the same side of the line, it is a cis-double bond

Naming Alkenes If the two ends of the chain are on opposite sides of the line, it is a trans-double bond

Naming Alkenes Place cis or trans at the start of the name in the organic compound

trans-2-butene trans-buta-2-ene

Draw the Following: trans-3-ethyl-4,6- dimethyl-5- cyclopentyl-2-octene

Drill: Draw the condensed, skeletal, & stick structures for: cis-3-ethyl-4,6-dimethyl-5- cyclopropyl-2-octene

Review Alkenes & Cycloalkanes

Name:

Main chain

Name ending

Branches

trans-3,4-dimethyl- 3-hexene

Name:

Main Chain

Name ending

Branches

trans-3-methyl-2- cyclopropyl-3-heptene

Name:

Main Chain

Name Ending

Branches

cis,trans-7-methyl- 2,4-nonadiene

Name:

Main chain or cycle:

Branches:

1,1,2,2,4,4- hexamethylcyclohexane:

Name:

Main chain or cycle:

Branches:

Cyclohexylcyclohexane:

Name:

Main chain or cycle:

Branches:

1,4-dicyclohexyl cyclohexane:

Draw: trans-1- cyclobutyl-2- methyl-3-hexene

Draw: cis-2-methyl-1- octylcyclohexene

Draw & Name isomers of: C 5 H 10

Naming Alkenes Name the alkenes on the board