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138 Chapter 3
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b.
The systematic name is under each structure.
c.
Only #1 (octane or
n
-octane) and #2 (isooctane) have common names.
d.
#2, #7, #8, #9, #12, #13, #14, #17
e.
#3, #8, #10, #11
f.
#5, #11, #12, #15
13.
a.
isopropyl and (1-methylethyl)
b.
tert
-butyl and (1,1-dimethylethyl)
c.
sec
-butyl and (1-methylpropyl)
d.
isobutyl and (2-methylpropyl)
14.
a.
3 2 2 2 3
CH CH CH CH CH
b.
CH
3
CCH
3
CH
3
CH
3
c.
CH
3
CHCH
2
CH
3
CH
3
d.
CH
3
CHCH
2
CH
3
CH
3
pentane 2,2-dimethylpropane 2-methylbutane 2-methylbutane
15.
a.
1-ethyl-2-methylcyclopentane
b.
ethylcyclobutane
c.
4-ethyl-1,2-dimethylcyclohexane
d.
3,6-dimethyldecane
e.
2-cyclopropylhexane
f.
1-ethyl-3-isobutylcyclohexane or
1-ethyl-3-(2-methylpropyl)cyclohexane
g.
5-isopropylnonane 5-(1-methylethyl)nonane
h.
1-
sec
-butyl-4-isopropylcyclohexane or
1-(2-methylethyl)-4-(2-methylpropyl)cyclohexane
i.
2,2,6-trimethylheptane
16.
O
HO
OH
N
0
0
1
0
1
3
2
1
1
17.
a.
OH
b.
c.
d.
O
e.
N
H
f.
Br