1. No category

CHM 234, Spring 2015
QUIZ #
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QUESTION 1
MC30p
When attached to a π-system such as a benzene ring or a
conjugated diene, the following substituents are....
O
N C
Et
O2N
H2N
H N C
2
1
2
3
A
1, 3 = donating
AND
B
1, 2, 3 = donating
C
1, 2, 3, 5 = donating
D
3 = donating
AND
5
4
2, 4, 5 = withdrawing
AND
4, 5 = withdrawing
AND
4 = withdrawing
1, 2, 4, 5 = withdrawing
QUESTION 2
MC40b
Which best describes the following reaction?
Me
Me
heat
Me
A
B
C
D
Me
Conrotatory
Disrotatory
Neither Conrotatory or Disrotatory
Not Enough Information To Tell
QUESTION 3
MC40g
Which best describes the following reaction? The question
is asking whether the PROVIDED product is allowed or
forbidden, AND, IF THIS product were to be formed
(ignoring for the moment whether it is allowed or
forbidden) would it be formed via a Huckel or a Mobius
transition state.
H
heat
+
8 arrows A Hückel
B Hückel
C Möbius
D Möbius
16 electrons
transition state,
transition state,
transition state,
transition state,
H
allowed product
forbidden product
allowed product
forbidden product
QUESTION 4
MC40i
Which best describes the following reaction? The question
is asking whether the PROVIDED product is allowed or
forbidden, AND, IF THIS product were to be formed
(ignoring for the moment whether it is allowed or
forbidden) would it be formed via a Huckel or a Mobius
transition state.
CF3
Me
A
B
C
D
Hückel
Hückel
Möbius
Möbius
Me
CF3
heat
Me
transition
transition
transition
transition
Me
Me
state,
state,
state,
state,
Me
allowed product
forbidden product
allowed product
forbidden product
QUESTION 5
MC40n
Deprotonation of Ha in the following structure with a
very strong base results in an anion that undergoes an
electrocyclic ring closing reaction. Which is the
product of this reaction?
Ph
Ha
N
N
Base
Anion
Ph
Ph
Ph
N
Ph
Ring-closed product
Ph
N
N
Ph
A
Ph
Ph
N
B
N
Ph
Ph
Ph
N
N
Ph
C
Ph
N
D
QUESTION 6
MC40o
Which best describes the following reaction?
Ph
Ph
Ph
+
Ph
Ph
A
B
C
D
(±)
Ph
suprafacial on the anion and suprafacial on the alkene
suprafacial on the anion and antarafacial on the alkene
antafacial on the anion and suprafacial on the alkene
antarafacial on the anion and antarafacial on the alkene
Ph
QUESTION 7
MC41a
Which describes the following structure
(assume that all of the carbon atoms (including the
2 methy groups) and nitrogen atoms all occupy the
same plane, i.e. that the structure is flat)?
H3C N
A
B
C
D
N CH3
Aromatic
Antiaromatic
Nonaromatic
Not Enough Information To Tell
QUESTION 8
MC41d
Which best describes the following structure
(assume that it is flat)?
A
B
C
D
Aromatic
Antiaromatic
Nonaromatic
Not enough information to decide
QUESTION 9
There are NO INCORRECT answers to this question, ALL
answers to this question will be considered correct for grading
purposes
What overall final grade do you expect to earn in this class?
A
B
C
D
QUESTION 10
There are NO INCORRECT answers to this question, ALL
answers to this question will be considered correct for grading
purposes
How hard did you work on organic chemistry this week (not
including watching/attending lectures)
A
B
C
D
Very Hard
Hard
Somewhat Hard
Not very Hard this week