Pyrrole is a weak base because: A) the nitrogen lone ...

[kodithompson]

Pyrrole is a weak base because:
   
 
   
  A)
  the nitrogen lone pair is part of the aromatic system.
  B)
  the nitrogen lone pair is in an sp²-hybridized orbital.
  C)
  the nitrogen lone pair is on a highly electronegative atom.
  D)
  the nitrogen lone pair is easily deprotonated
  E)
  the nitrogen lone pair is easily protonated.

Question 2

In imidazole,
   
  A)
  the chemistry is more like a diene than like an aromatic compound.
  B)
  the chemistry is more like an isolated alkene than an aromatic compound.
  C)
  N¹ is more basic than N³.
  D)
  both N³ and N¹ are equally basic.
  E)
  N³ is more basic than N¹.

Question 3

The decreasing order of basicity of the following is:
   
   
  A)
  1 > 2 > 3
  B)
  1 > 3 > 2
  C)
  3 > 2 > 1
  D)
  2 > 1 > 3
  E)
  3 > 1 > 2

Question 4

Pyridine is a weaker base than aliphatic tertiary amines because
  A)
  the N is sp² hybridized in pyridine and sp³ hybridized in aliphatic amines.
  B)
  there are no unshared electrons on the N in pyridine.
  C)
  the electrons on the N in pyridine are delocalized around the ring.
  D)
  the N in pyridine is already protonated.
  E)
  the unshared electron pair on N in pyridine is part of the aromatic p system.

[Jevvish]

Answer to Question 1

a

Answer to Question 2

e

Answer to Question 3

c

Answer to Question 4

a

[kodithompson]

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[Jevvish]

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