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(a)
(b)
(c)
(d)
Q 3.5.
Which of the following molecules can show
cis
/
trans
stereoisomer-
ism? Where
cis
/
trans
isomers are possible, draw a structure for the
cis
-isomer.
(a)
(b)
(c)
(d)
Q 3.6.
Draw structures for the following compounds and use these to decide if
cis
/
trans
stereoisomerism is possible. If it is, draw the
trans
-isomer.
(a)
2-Methyl-3-hexene
(b)
2-Methyl-2-hexene
(c)
2-Methyl-1-butene
(d)
3-Ethyl-3-methyl-1-pentene
(e)
Vinylcyclopropane
(f)
1-Isopropyl-4-methylcyclo-
hexene
(g)
2,5-Dimethyl-2-hexene
(h)
1,4-Dichlorocyclohexane
Q 3.7.
Draw the compound that fits the information provided in the following
text.
(a) Molecular formula C
6
H
10
, three methyl groups.
(b) C
5
H
10
, no
cis
-
trans
stereoisomerism, and has one ethyl group.
(c) C
3
H
6
O
2
, has an aldehyde and a secondary alcohol.
Q 3.8.
For the compound provided:
Indicate:
(a)
A part of the molecule with three carbon atoms that lie in a straight
line.
(b)
A tertiary carbon atom.
(c)
An
sp
2
-hybridized carbon.
(d)
An ethoxy group.
(e)
A part of the molecule that can have geometric isomerism.
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