SECTION 1.5 DIFFICULTY LEVEL
30. Which of the following are pairs of contributing structures?
I
CH
3
O
CH
3
CH
3
CH
2
OH
CH
2
O
CH
2
O
II
III
CH
2
CH
CH
2
CH
2
CH
CH
2
IV
N
C
O
N
C
O
a) II, IV
b) I, II, III
c) III, IV
d) II, III, ,IV
Answer: c
30. Which of the following are pairs of contributing structures?
I
CH
3
O
CH
3
CH
3
CH
2
OH
CH
2
O
CH
2
O
II
III
CH
2
CH
CH
2
CH
2
CH
CH
2
IV
N
C
O
N
C
O
a) II, IV
b) I, II, III
c) III, IV
d) II, III, ,IV
Answer: c