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Quiz2 Key 3.pdf
Quiz2_Key_3.pdf
Showing 13-15 out of 15
CHEM | 30 | Organic Chemistry | exam |Q 1 2 3 4 5 ...
CHEM | 30 | Organic Chemistry | exam |Q 1 2 3 4 5 6 7 8 9 10 Last Name Student ID Number: Discussion Section – Day: Time: Circle the name of your TA: CARI HEATHER RYAN KAUSHIK Chem 30A Fall 2005 QUIZ #2A (15 Min) Weds Nov 9th INTERPRETATION OF THE QUESTIONS IS PART OF THE EXAM – DO NOT ASK FOR THE QUESTIONS TO BE EXPLAINED TO YOU USE CAPITAL LETTERS WHEN FILLING IN THE BOXES AND BE CLEAR – IF WE CAN'T FIGURE OUT WH
CHEM | 30 | Organic Chemistry | exa...
CHEM | 30 | Organic Chemistry | exam |Q 1 2 3 4 5 6 7 8 9 10 Last Name Student ID Number: Discussion Section – Day: Time: Circle the name of your TA: CARI HEATHER RYAN KAUSHIK Chem 30A Fall 2005 QUIZ #2A (15 Min) Weds Nov 9th INTERPRETATION OF THE QUESTIONS IS PART OF THE EXAM – DO NOT ASK FOR THE QUESTIONS TO BE EXPLAINED TO YOU USE CAPITAL LETTERS WHEN FILLING IN THE BOXES AND BE CLEAR – IF WE CAN'T FIGURE OUT WH
Page 13
2
3
. Pyridine, shown below, is most accurately described as:
N
Pyridine
A
A Lewis acid and a Lewis base
B
A Lewis acid and a Bronsted base
C
A Bronsted base but NOT a Lewis base
D
A Lewis base but NOT a Bronsted base
E
A Lewis base and a Bronsted base
4
. What is the Index of Hydrogen Deficiency (number of double bond equivalents) for the
compound drawn below?
N
H
H
N
O
O
Indigo
A
13
B
15
C
9
D
11
E
7
5
. What is the order of acidity (from lowest p
K
a
value to highest p
K
a
value) of the bold
hydrogen (
H
) atoms shown highlighted in the compounds drawn below?
1
O
H
O
H
O
H
O
2
N
O
H
O
2
N
2
3
4
A
2, 1, 4, 3
B
1, 3, 4, 2
C
3, 4, 1, 2
D
2, 1, 4, 3
E
4, 3, 1, 2
6
. The equilibrium constant (
K
eq
) for the reaction shown below is...?
Acid
+
Base
Conjugate Acid
+
Conjugate Base
p
K
a
= –2
p
K
a
= 2
A
0.0001
B
0
C
–1
D
4
E
10000
Page 14
3
7
. What is the order of basicity (from least basic to most basic) of the nitrogen-based anions
drawn below?
1
NH
F
3
C
NH
F
3
C
NH
F
3
C
NH
O
2
3
4
A
3, 2, 1, 4
B
4, 3, 2, 1
C
1, 2, 3, 4
D
4, 1, 2, 3
E
3, 4, 2, 1
8
. For the triene shown below, for which double bond(s) is it possible to assign
E
or
Z
descriptors?
A
1
,
2
, and
3
B
Only
2
C
Only
1
and
2
D
Only
1
E
Only
2
and
3
9
. What is the major product of the reaction shown below?
HCl
Ether (solvent)
?
A
3-chloro-3-methylpentane
B
2-chloro-3-ethylbutane
C
1-chloro-3-methylpentane
D
3-chloro-2-methylpentane
E
2-chloro-3-methylpentane
10
. Which combination(s) of reagents would give rise to the reaction shown below?
?
OH
#1
(i) BH
3
·THF (ii) H
2
O
2
/ NaOH
#2
(i) Hg(OAc)
2
/H
2
O (ii) NaBH
4
#3
H
2
O/H
2
SO
4
(cat.)
A
#1, #2, and #3
B
Only #2 and #3
C
Only #3
D
Only #1
E
Only #2
1
2
3
Page 15
4
BONUS
: 1,5,9-Cyclododecatriene reacts with borane·THF to form two different compounds
(
A
and
B
) with the formula C
12
H
21
B. Neither
A
nor
B
contains any B–H bonds. On the
FRONT PAGE of this quiz, fill in the structures of
A
and
B
, and indicate which one is likely to
be formed in higher yield.
BH
3
·THF
C
12
H
21
B
A
C
12
H
21
B
B
+
*****
End of Quiz
*****
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