CHAPTER 8: ANSWERS TO SELECTED PROBLEMS
SAMPLE PROBLEMS (“Try it yourself”)
8.1
8.2
8.3 CH3–CH2–CH2–CH2–CH2–CH3
8.4
8.5 a) This molecule is not an isomer of hexane, because it does not have the same molecular
formula as hexane. Hexane contains six carbon atoms and fourteen hydrogen atoms, but this
molecule contains five carbon atoms and twelve hydrogen atoms.
b) This molecule is an isomer of hexane, because it has the same molecular formula as
hexane, but it has a different structure. Both molecules contain six carbon atoms and fourteen
hydrogen atoms. However, hexane is an unbranched alkane, while this molecule is branched.
8.6 cycloheptane
8.7 4-propyloctane
8.8 4,4-diethyl-3-methylheptane
8.9
H C
H
C
H
C
H
C
H
C
H
H
H
This carbon atom only forms three bonds.
This carbon atom forms five bonds.
H C C C C C C H
H
H
H
H
H
H
H
H
H
H
H
H
CH3CH2CH CH CH2CH2
CH3
CH2CH3
CH2
CH3
