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Question 1 (1 point) Question 3 (1 point) Select the THREE true statements: Put these compounds in order of INCREASING heat of hydrogenation. The...
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Need help with these orgo practice problems. They require organic chemistry knowledge. Explain and answer each question.

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Question 1 (1 point)
Question 3 (1 point) Select the THREE true statements:
Put these compounds in order of INCREASING heat of hydrogenation. The
compound with the lowest heat of hydrogenation will be marked '1' Note that the
number of double bonds is not the same in each compound.
ON
Scheme A
Scheme B
B
Question 3 options:
Scheme A shows two resonance structures, which means that the true structure is an average of
C
the two structures drawn.
B
Scheme B shows two resonance structures, which means that the true structure is an average of
O
the two structures drawn.
In the part of the diagram with resonance structures, the bond length is shorter than a double
A
bond, but longer than a single bond and has 1.5 bond order
In the part of the diagram with resonance structures, the bond length is longer than a double
Question 2 (1 point)
bond, but shorter than a single bond and has 1.5 bond order
Put these structures in order of INCREASING heat of hydrogenation. The compound
with the smallest value (lowest magnitude) for its heat of hydrogenation should be
Electrons are delocalized in the scheme with resonance structures
given a value of '1'
Electrons are localized in the scheme with resonance structures
Question 4 (1 point)|
Select the TWO correct statements
H.
H.
O :
A
B
C
D
H
Structure A
Structure B
DO
Question 4 options:
Structure A is more stable because it has more octets
Structure A is more stable because it puts the positive charge on the better atom
Structure B is more stable because it puts the positive charge on the better atom
The bond between C and N of this compound is shorter than a typical C-N single bond
The bond between C and N of this compound is shorter than a typical C=N double bond
Screenshot (87).png
Question 5 (1 point) Select ALL of the compounds that are stabilized by resonance question 5 options: I— A
l— B
F c l— D
Question 6 (1 point) Select the true statement about the addition of MCI to 1,3 butadiene, shown here: Question 6 options: F The top structure is the kinetic product and obtained at cold temperatures
F The top structure is the kinetic product and obtained at hot temperatures
V‘ The top structure is the thermodynamic product and obtained at cold temperatures r The top structure is the thermodynamic product and obtained at hot temperatures Question 7 (1 point) Select THREE true statements about this diagram mason mans... Question 7 options: ’— 7 7 7 7 The green line corresponds to the kinetic product The blue line corresponds to the kinetic product The green line corresponds to the more stable product
The blue line corresponds to the more stable product A kinetic product is always made faster. [Note: in some reactions, the kinetic product and the
thermodynamic product are the same productll Athermodynamic product is always made faster. (Note: in some reactions. the kinetic product
and the thermodynamic product are the same productl]
Screenshot (88).png
Question 8 (1 point) Select the THREE true statements HCl -78 ‘C Cl
9 / \ e / \ Cl
A B c D
| Question 8 options: '_ Both A and B are resonance structures that exist under both kinetic and thermodynamic
conditions These resonance structures are produced under different conditions Product C is expected under these conditions Product D is expected under these conditions These conditions favor the faster-formed product over the more stable product These conditions favor the more stable product over the faster-formed products Question 5 (1 point) Select the THREE true statements HCl 40 'C CI
9/ \© /‘ \ c!
l
1
A B C‘ D Question 9 options: F ‘l—l—lj—l Both A and B are resonance structures that exist under both kinetic and thermodynamic
conditions These resonance structures are produced under different conditions Product C is expected under these conditions Product D is expected under these conditions These conditions favor the faster-formed product over the more stable product These conditions favor the more stable product over the fastenforlned products
Screenshot (89).png
Question 10 (1 point) Select the product
Question 11 (1 point) Put these dienes in order of their speed of reaction in the Diels-Alder reaction. 1
will be the slowest (and in this case, doesn't even react at all)
OMe
ON
OMe
??????
O2N
A
B
E
OM
Me
OMe
OMe
NO2
NO2
Question 11 options:
NO2
NO
NO2
NO2
A
B
C
NO2
D
E
Question 10 options:
O
A
A
B
O
C
Question 12 (1 point)
D
Which of the following statements is true of the Diels-Alder reaction?
Question 12 options:
both the diene and the dieneophile benefit from electron-donating groups
the diene benefits from an electron-donating group and the dieneophile benefits from an
electron-withdrawing group
both the diene and the dieneophile benefit from electron-withdrawing groups
the diene benefits from an electron-withdrawing group and the dieneophile benefits from an
electron-donating group
Screenshot (90).png
Question 13 (1 point) Match each structure to its description
A
B
E
O
this bond
=C =
+
H
O
Question 13 options:
E
H
C
1. conjugated system
2. isolated system (not conjugated)
3. cumulated system (not conjugated)
4. vinyl or phenyl/aryl cation (not conjugated)
D
B

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