Question 1

Exhibit 5-3
Assign R,S configurations to each indicated chirality center in the molecules below.
​ 
-Refer to Exhibit 5-3.The configuration of this carbon atom (C) is _____.

Accepted Answer

The answer of Exhibit 5-3
Assign R,S configurations to each indicated...

Question 2

Exhibit 5-6
Refer to the structure below to answer the following question(s) .
​ 
-Refer to Exhibit 5-6.(S) -(−) -Serine:

Accepted Answer

A)  is dextrorotatory
B)  rotates plane-polarized light in a counterclockwise direction
C)  rotates plane-polarized light in a clockwise direction
D)  is racemicE) A) and D)
F) A) and B)

Question 3

Draw a Newman projection of the most stable conformation of (2R,3S)-dibromobutane sighting down the C2−C3 bond.

Accepted Answer

The answer of Draw a Newman projection of the most...

Question 4

Acetoacetate synthase catalyzes the addition of pyruvate to β-ketobutyrate to yield α-aceto-α-hydroxybutyrate.If the addition occurs from the si face of β-ketobutyrate,what is the stereochemistry of the product?

Accepted Answer

Addition of the aceto group to...

Question 5

Exhibit 5-5
Label each pair of stereoisomers below as:
-_____

Accepted Answer

A)  enantiomers
B)  diastereomers
C)  identicalPlace the letter of the correct answer in the blank to the left of the pair of stereoisomers.D) B) and C)
E) None of the above

Question 6

Which of the following compounds will rotate the plane of polarized light?

Accepted Answer

A)   
B)   
C)   
D)   E) None of the above
F) B) and D)

Question 7

Exhibit 5-3
Assign R,S configurations to each indicated chirality center in the molecules below.
​ 
-Refer to Exhibit 5-3.The configuration of this carbon atom (D) is _____.

Accepted Answer

The answer of Exhibit 5-3
Assign R,S configurations to each indicated...

Question 8

Exhibit 5-5
Label each pair of stereoisomers below as:
-_____

Accepted Answer

A)  enantiomers
B)  diastereomers
C)  identicalPlace the letter of the correct answer in the blank to the left of the pair of stereoisomers.D) None of the above
E) A) and C)

Question 9

Which of the following objects is not chiral?

Accepted Answer

A)  baseball glove
B)  ballerina slipper
C)  corkscrew
D)  comb
E)  All are chiral.F) C) and D)
G) B) and C)

Question 10

Estriol,a potent estrogenic hormone,has been isolated from the urine of pregnant women.When 40 mg of estriol is dissolved in 1.0 mL of dioxane and placed in a sample tube with 1 dm path length a rotation of +2.32° is observed.Calculate the specific rotation for estriol.

Accepted Answer

The answer of Estriol,a potent estrogenic hormone,has been isolated from...

Question 11

Exhibit 5-4
Consider the structure of streptimidone to answer the following question(s).
​ 
-Refer to Exhibit 5-4.Based on the number of chirality centers,how many stereoisomers of streptimidone are possible?

Accepted Answer

Streptimidone has tw...

Question 12

_____ is an atom in a molecule that is bonded to four different atoms or groups of atoms.

Accepted Answer

A)  racemates
B)  chirality center
C)  chirality
D)  diastereomers
E)  enantiomersF) meso compoundsG) optically activeH) prochirality centerI) optically inactiveJ) achiralK) A) and E)
L) C) and F)

Question 13

Exhibit 5-5
Label each pair of stereoisomers below as:
-_____

Accepted Answer

A)  enantiomers
B)  diastereomers
C)  identicalPlace the letter of the correct answer in the blank to the left of the pair of stereoisomers.D) All of the above
E) A) and B)

Question 14

Draw a wedge-dash projection of (2R,3S)-dibromobutane.

Accepted Answer

The answer of Draw a wedge-dash projection of (2R,3S)-dibromobutane....

Question 15

Exhibit 5-7
A natural product having [α]D = +40.3° has been isolated and purified.
-Refer to Exhibit 5-7.This information indicates that the natural product:

Accepted Answer

A)  is racemic.
B)  does not rotate plane-polarized light.
C)  is levorotatory.
D)  is dextrorotatory.E) B) and D)
F) C) and D)

Question 16

Draw a structure for a singly substituted chiral chloroalkane that contains four carbon atoms.Indicate the chirality center with an asterisk (*).

Accepted Answer

<img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> The chirality cente...

Question 17

In which of the following groups can the carbon atom be a chiral center?

Accepted Answer

A)   
B)   
C)   
D)   
E)  The carbon atoms cannot be a chiral center in any of these groups.F) D) and E)
G) B) and C)

Question 18

Exhibit 5-6
Refer to the structure below to answer the following question(s).
​ 
-Refer to Exhibit 5-6.Give the complete name of the enantiomer of (S)-(−)-serine.

Accepted Answer

The answer of Exhibit 5-6
Refer to the structure below to...

Question 19

The specific rotation of a compound is denoted by the symbol:

Accepted Answer

A)  R
B)  S
C)  α
D)   E) A) and B)
F) C) and D)

Question 20

A compound with specific rotation,[α]D = +35.4° reacts to form a single product.The product of the reaction shows no optical activity.This could mean that the product:

Accepted Answer

A)  is a racemate.
B)  does not have any chiral centers.
C)  is a meso compound.
D)  Any of the above are possible explanations.E) C) and D)
F) B) and D)

Exam 5: Stereochemistry at Tetrahedral Centers

Draw a Newman projection of the most stable conformation of (2R,3S)-dibromobutane sighting down the C2−C3 bond.

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A compound with specific rotation,[α]D = +35.4° reacts to form a single product.The product of the reaction shows no optical activity.This could mean that the product:

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In which of the following groups can the carbon atom be a chiral center?

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Exhibit 5-7 A natural product having [α]D = +40.3° has been isolated and purified. -Refer to Exhibit 5-7.This information indicates that the natural product:

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Exhibit 5-3 Assign R,S configurations to each indicated chirality center in the molecules below. ​ -Refer to Exhibit 5-3.The configuration of this carbon atom (C) is _____.

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Draw a wedge-dash projection of (2R,3S)-dibromobutane.

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Exhibit 5-5 Label each pair of stereoisomers below as: -_____

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Exhibit 5-5 Label each pair of stereoisomers below as: -_____

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Exhibit 5-6 Refer to the structure below to answer the following question(s) . ​ -Refer to Exhibit 5-6.(S) -(−) -Serine:

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Exhibit 5-4 Consider the structure of streptimidone to answer the following question(s). ​ -Refer to Exhibit 5-4.Based on the number of chirality centers,how many stereoisomers of streptimidone are possible?

Correct AnswerverifiedStreptimidone has tw...View AnswerShow Answer

Exhibit 5-5 Label each pair of stereoisomers below as: -_____

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Exhibit 5-3 Assign R,S configurations to each indicated chirality center in the molecules below. ​ -Refer to Exhibit 5-3.The configuration of this carbon atom (D) is _____.

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Which of the following objects is not chiral?

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Acetoacetate synthase catalyzes the addition of pyruvate to β-ketobutyrate to yield α-aceto-α-hydroxybutyrate.If the addition occurs from the si face of β-ketobutyrate,what is the stereochemistry of the product?

Correct AnswerverifiedAddition of the aceto group to...View AnswerShow Answer

Exhibit 5-6 Refer to the structure below to answer the following question(s). ​ -Refer to Exhibit 5-6.Give the complete name of the enantiomer of (S)-(−)-serine.

Correct AnswerverifiedShow Answer

Estriol,a potent estrogenic hormone,has been isolated from the urine of pregnant women.When 40 mg of estriol is dissolved in 1.0 mL of dioxane and placed in a sample tube with 1 dm path length a rotation of +2.32° is observed.Calculate the specific rotation for estriol.

Correct AnswerverifiedShow Answer

Draw a structure for a singly substituted chiral chloroalkane that contains four carbon atoms.Indicate the chirality center with an asterisk (*).

Correct Answerverified The chirality cente...View AnswerShow Answer

Which of the following compounds will rotate the plane of polarized light?

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The specific rotation of a compound is denoted by the symbol:

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_____ is an atom in a molecule that is bonded to four different atoms or groups of atoms.

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A compound with specific rotation,[α]_D = +35.4° reacts to form a single product.The product of the reaction shows no optical activity.This could mean that the product:

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Exhibit 5-7 A natural product having [α]_D = +40.3° has been isolated and purified. -Refer to Exhibit 5-7.This information indicates that the natural product:

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Exhibit 5-3 Assign R,S configurations to each indicated chirality center in the molecules below. -Refer to Exhibit 5-3.The configuration of this carbon atom (C) is _____.

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Exhibit 5-6 Refer to the structure below to answer the following question(s) . -Refer to Exhibit 5-6.(S) -(−) -Serine:

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Exhibit 5-4 Consider the structure of streptimidone to answer the following question(s). -Refer to Exhibit 5-4.Based on the number of chirality centers,how many stereoisomers of streptimidone are possible?

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Streptimidone has tw...
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Exhibit 5-3 Assign R,S configurations to each indicated chirality center in the molecules below. -Refer to Exhibit 5-3.The configuration of this carbon atom (D) is _____.

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Addition of the aceto group to...
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Exhibit 5-6 Refer to the structure below to answer the following question(s). -Refer to Exhibit 5-6.Give the complete name of the enantiomer of (S)-(−)-serine.

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The chirality cente...
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