Drill: Draw & name 3 isomers of C 5 H 12. Alkenes.

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Presentation transcript:

Drill: Draw & name 3 isomers of C 5 H 12

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

Problems

Geometric Isom

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

Naming Alkenes trans-2-butene

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

Organic Chm HW Test 2 on Cycloalkanes & alkenes is on Friday

Review

Name:

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