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Chapter 5 199
Copyright © 2017 Pearson Education, Inc.
44.
a.
CH
2
CHCH
2
CH
2
CH
2
CH
3
1-hexene
CH
3
CH CHCH
2
CH
2
CH
3
2-hexene
CH
3
CH
2
CH CHCH
2
CH
3
3-hexene
CH
2
CCH
2
CH
2
CH
3
2-methyl-1-pentene
CH
2
CHCHCH
2
CH
3
3-methyl-1-pentene
CH
2
CHCH
2
CHCH
3
4-methyl-1-pentene
CH
3
CH
3
CH
3
C CHCH
2
CH
3
2-methyl-2-pentene
CH
3
CH CCH
2
CH
3
3-methyl-2-pentene
CH
3
CH CHCHCH
3
4-methyl-2-pentene
CH
3
CH
3
CH
3
CH
2
CCHCH
3
2,3-dimethyl-1-butene
CH
3
CCH CH
2
3,3-dimethyl-1-butene
CH
3
CH
2
C CH
2
2-ethyl-1-butene
CH
3
CH
3
CH
2
CH
3
CH
3
C CCH
3
2,3-dimethyl-2-butene
CH
3
CH
3
CH
3
CH
3
CH
3
b.
Of the compounds shown in part
a
, the following can have
E
and
Z
isomers:
2-hexene, 3-hexene, 3-methyl-2-pentene, 4-methyl-2-pentene
c.
CH
3
C CCH
3
CH
3
CH
3
This compound is the most stable.
It has four alkyl substituents
bonded to the
sp
2
carbons.
d.
CH
2
CHCH
2
CH
2
CH
2
CH
3
CH
2
CHCH
2
CHCH
3
CH
3
CH
2
CHCHCH
2
CH
3
CH
3
CCH CH
2
CH
3
CH
3
CH
3
These compounds are the least stable.
Each has only one alkyl substituent bonded to the
sp
2
carbons.
45.
a.
1
E
2
-3-methyl-3-hexene
b.
trans
-8-methyl-4-nonene or
1
E
2
-8-methyl-4-nonene
c.
trans
-9-bromo-2-nonene or
1
E
2
-9-bromo-2-nonene
d.
2,4-dimethyl-1-pentene
e.
2-ethyl-1-pentene
f.
cis
-2-pentene or
1
Z
2
-2-pentene