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CHAPTER 2 31 
 
use drawings like these as a form of “short-hand” so that you can identify all of the different ways of 
connecting three carbon atoms and one oxygen atom: 
 
 
 
But your final structures should either show all C and H labels, or no labels at all. The latter is the more 
commonly used method: 
 
 
 
 
Solutions 
 
2.1. 
(a) The condensed structure indicates the constitution 
(how the atoms are connected to each other). The Lewis 
structure shows these connections more clearly, because 
every bond is drawn: 
 
 
(b) The condensed structure indicates the constitution 
(how the atoms are connected to each other). The Lewis 
structure shows these connections more clearly, because 
every bond is drawn: 
 
 
(c) The condensed structure indicates the constitution 
(how the atoms are connected to each other). The Lewis 
structure shows these connections more clearly, because 
every bond is drawn: 
 
 
(d) The condensed structure indicates the constitution 
(how the atoms are connected to each other). The Lewis 
structure shows these connections more clearly, because 
every bond is drawn: 
 
 
(e) The condensed structure indicates the constitution 
(how the atoms are connected to each other). The Lewis 
structure shows these connections more clearly, because 
every bond is drawn: 
C
O
H
C C
C
C
H
H
H
H H
H
H H
H
H
CC
H
H
H
CH2=CHCH2OCH2CH(CH3)2
Lewis structure
Condensed structure
 
 
(f) The condensed structure indicates the constitution 
(how the atoms are connected to each other). The Lewis 
structure shows these connections more clearly, because 
every bond is drawn: 
 
 
(g) The condensed structure indicates the constitution 
(how the atoms are connected to each other). The Lewis 
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