The octane rating for gasoline is a measurement of how readily a fuel combusts compared to 2,2,4-trimethylpentane, an isomer of octane.

a. Draw 2,2,4-trimethylpentane and verify that it is an isomer of octane.

b. Draw four other isomers of octane.

c. Select one of the isomers and draw it so that it looks different on the page, but is still the exact same compound.

d. Name the isomer you drew in part c.

e. Define “isomer” using a complete sentence.