Aromatic and Heterocyclic Compounds (5D)
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QUESTION
Identify the aromaticity of cyclobutadiene,
C
4
H
4
\text{C}_4\text{H}_4
C
4
H
4
, if it were planar and conjugated.
QUESTION
What is the
electron count required for aromaticity when
n
=
2
n=2
n
=
2
in
4
n
+
2
4n+2
4
n
+
2
?
QUESTION
What is the
electron count required for antiaromaticity when
n
=
2
n=2
n
=
2
in
4
n
4n
4
n
?
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ANSWER
8
8
8
electrons. Hückel's rule for antiaromaticity produces this electron count for
n
=
2
n=2
n
=
2
, indicating potential instability in such systems.
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