Drill Name the following Alkenes Alkenes Hydrocarbons with

Drill: Name the following:

Alkenes

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 4 2 1 3 2 -butene or Buta-2 -ene

Problems 4 2 1 3 4

Geometric Isomers 4 2 1 3 4

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 4 2 1 3

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 4 2 1 3

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