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Chapter 8: Aromaticity - Reactions of Benzene and Substituted Benzenes
Exercises
Practice Exercise 2
Practice Exercise 2
This activity contains 7 questions.
In which orbital are the lone pair electrons on the nitrogen atom of pyrrole?
sp
sp
2
sp
3
s
p
Which of the following features is
not
characteristic of aromatic compounds?
They have an uninterrupted cloud of delocalized pi electrons.
They are cyclic.
They are planar.
They contain an odd number of pairs of pi electrons.
The ring atoms must be carbon atoms.
What is the hybridization of the ring atoms in an aromatic compound?
p
s
sp
sp
2
sp
3
How many pi electrons does the carbocation intermediate have that is formed in an electrophilic aromatic substitution reaction of benzene?
6
5
4
3
2
What kind of catalyst is essential for halogenation of aromatic compounds with Cl
2
or Br
2
?
a Brønsted acid
a Lewis base
light
a Lewis acid
a Brønsted base
Why do aromatic compounds undergo electrophilic substitution rather than electrophilic addition?
The addition product is much less stable than the substitution product, since it is nonaromatic.
Formation of the substituted benzene is highly exergonic.
Aromatic compounds are not very stable.
Aromatic compounds are not nucleophiles.
What is the electrophilic species in the sulfonation of an aromatic compound?
SO
2
+
H
2
SO
4
SO
3
HSO
3
+
H
2
O
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