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Structural Identification and Practical Organic Chemistry
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Degree of unsaturation of drawn compounds
JEE Main level
Numerical answer
Difficulty 2 of 3
si228
Find the degree of unsaturation of the compound shown, as an integer (rings plus pi bonds; each C=O counts as one).
Numerical answer type, tolerance 0.5.
Answer: 6
The compound shown is aspirin,
C
X
9
H
X
8
O
X
4
: one ring, three ring C=C and two C=O, so
1
+
3
+
2
=
6
. Formula check:
(
20
−
8
)
/2
=
6
.
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