Aims:1. Discuss the cycloalkane family.

Homologous series

Look similar

Same first name

All ring structures

CycloalkanesCycloalkanes• The cycloalkanes are another series of

hydrocarbons. • The carbon atoms form a ring and all

carbon to carbon bonds are saturated (carbon to carbon single bonds).

Cyclopropane

C

C

C

HH

H

H

H

H

C3H6

Cyclobutane

C4H8C

C

C

C

H H

H

H

HH

H

H

Name of Cycloalkane

Molecular Formula

Full Structural Formula

Shortened Structural Formula

Cyclopropane

Cyclobutane

Cyclopentane

Cyclohexane

C3H6

C4H8

C5H10

C6H12

CH2

CH2

CH2

CH2

CH2

CH2CH2

CH2

CH2

CH2

CH2

CH2

CH2 CH2

CH2

CH2

CH2

CH2

Cycloalkanes – Homologous Cycloalkanes – Homologous seriesseries1.All cycloalkanes can be represented by

a general formula which is:

2.They all have similar chemical properties

3.There is a link between their physical properties and their melting and boiling points.

CnH2n

Isomers- Have the same molecular formula but

different structural formula.

e.g. C3H6 is the molecular formula for … Propene Cyclopropane

and

C

C

C

HH

H

H

H

H

Butene and cyclobutane are isomers because they both have the molecular formula C4H8 but their structures are different.

There are two isomers of butane, both with the molecular formula C4H10.

Butane 2-methylpropane

The larger the hydrocarbon, the more isomers are possible. Can you try to draw 3 isomers for pentane?