Drill: Draw & name 2 isomers

of C4H10

Cycloalkanes

Cycloalkanes•Alkane chains with the ends joined together

•Ring structures

Naming Cycloalkanes

•Place cyclo in front of the normal name

•Pentane cyclopentane

Name the organic compound

Substituted Cycloalkanes

•Cycloalkanes with other groups attached

Numbering Substituted

Cycloalkanes• The carbon with the most

important group is # 1, then continue around the ring

12

3 4

1-methylcyclobutane

Name:

1

2

3

4 5

1

2

3

4 5

1-ethyl-2,3-dimethylcyclopentane

Name:

3-ethyl-4-methyl-1-cyclopropylcyclohexane

Name:

5-ethyl-3-cyclohexyl-4-methyloctane

Cycloalkane Shapes

•Demonstrated through modeling

Cycloalkane Shapes

Chair Boat

HW: Draw the condensed, skeletal, & stick structures for 3-methyl-1-propylcyclopentane

Draw each of the following:

1,3,5-trimethylcyclohexane

1-cyclopropylcyclopentane

Draw condensed & stick structures for:

1,3-dimethylcyclopentanecyclobutylcyclohexane