Deck 8: Delocalized Electrons Their Eff

Question 1

Which of the following is not acceptable when drawing resonance structures?

A) Move electrons to sp or sp² hybridized atoms.
B) Positive charges are moved toward electrons.
C) Move lone-pair electrons.
D) Never move atoms.
E) Move pi electrons.

Answer 1

Positive charges are moved toward electrons.

Question 2

Which of the following is not an acceptable resonance structure of I?

A)
B)
C)
D)
E)

Answer 2

Question 3

Which structure makes the largest contribution to the resonance hybrid?

A)
B)
C)
D)
E)

Answer 3

Question 4

Which of the following is the strongest acid?

A)
B)
C)
D)
E)

Question 5

Which of the following products is the result of either 1,2 or 1,4-addition of HBr and is most stable?

A)
B)
C)
D)
E)

Question 6

Which diene will react most readily with a dienophile?

A)
B)
C)
D)
E)

Question 7

Which compound is the expected product of this reaction?

A)
B)
C)
D)
E)

Question 8

Which of the following criteria must be met for a molecule to be aromatic?

A) The molecule must be cyclic.
B) The molecule must be planar.
C) Every atom must have a p orbital.
D) The molecule must contain an odd number of pairs of ? electrons.
E) All of the above.

Question 9

Which products are, respectively, the kinetic and thermodynamic product?

A) 1,2
B) 1,3
C) 2,1
D) 2,3
E) 3,1

Question 10

Assuming planarity, which of the following molecules is aromatic?

A)
B)
C)
D)
E)

Question 11

Which of the following molecular orbital diagrams
best fits that of pyrrole?
pyrrole

A)
B)
C)
D)