Question 1

A natural product having [$\alpha$]D = +40.3$\circ$ has been isolated and purified. Either of the following substances could be this natural product.

Accepted Answer

A) True 
 B)False

Question 2

Complete the following zig-zag structure so that it represents (2R,3S)-3-chlorobutan-2-ol.

Accepted Answer

The answer of Complete the following zig-zag structure so that...

Question 3

How much of the R enantiomer is present in 10 g of a mixture which has an enantiomeric excess of 60% of the R isomer?

Accepted Answer

A)  2 g
B)  4 g
C)  6 g
D)  8 gE) B) and D)
F) A) and C)

Question 4

Complete the following Newman projection so that it represents (2R,3S)-2,3-dibromobutane.

Accepted Answer

The answer of Complete the following Newman projection so that...

Question 5

Which of the following structures is different from the other three?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) All of the above
F) A) and B)

Question 6

The absolute configurations around C-2 and C-3 in the following Fischer projection are, respectively, ____. (Enter the two configurations separated by a comma.)

Accepted Answer

The answer of The absolute configurations around C-2 and C-3...

Question 7

______________ are stereoisomers that are not mirror images.

Accepted Answer

Diastereom...

Question 8

Which of the following Newman projections represents (2R,3R) -dibromobutane?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) None of the above
F) All of the above

Question 9

Complete the following diagram so that it represents (S)-2-butanol.

Accepted Answer

The answer of Complete the following diagram so that it...

Question 10

Which of the following have the S configuration?

Accepted Answer

A)  only 1
B)  only 2
C)  only 1 and 2
D)  1, 2 and 3E) A) and B)
F) A) and C)

Question 11

What is the correct order of the Cahn-Ingold-Prelog ranking of the following substituents as used in assigning R and S configurations of chiral centers? (higher ranking > lower ranking)  
1.-C-CH
2.-CH2NH2
3.-NHCH3
4) -CN

Accepted Answer

A)  3 > 2 > 4 > 1
B)  4 > 3 > 1 > 2
C)  3 > 4 > 2 > 1
D)  4 > 3 > 2 > 1E) A) and B)
F) B) and C)

Question 12

Which of the following compounds is/are chiral?

Accepted Answer

A)  only 1
B)  only 1 and 2
C)  only 2 and 3
D)  1, 2 and 3E) B) and D)
F) None of the above

Question 13

Which of the following structures does not have a plane of symmetry?

Accepted Answer

A)  only 2
B)  only 1 and 2
C)  only 3 and 4
D)  only 1, 2 and 4E) B) and D)
F) All of the above

Question 14

Which of the following is the definition of chirality?

Accepted Answer

A)  The non-superposability of an object on its mirror image
B)  The superposability of an object on its mirror image
C)  A molecule that has a carbon atom with four different substituents
D)  A molecule with a mirror imageE) A) and B)
F) B) and D)

Question 15

How many stereoisomers of 2,4-dimethylpentane, (CH3) 2CHCH2CH(CH3) 2, exist?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and B)
F) C) and D)

Question 16

How many stereoisomers of 4-chloro-2-methylpentane (CH3) 2CHCH2CHClCH3, exist?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) C) and D)
F) A) and D)

Question 17

The following structures depicts (__)-3-ethyl-2,3-dimethylhexane.

Accepted Answer

The answer of The following structures depicts (__)-3-ethyl-2,3-dimethylhexane. ...

Question 18

Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Accepted Answer

A)  "-COOH"
B)  "-CHO"
C)  "-CH2OH"
D)  "-CH3"E) A) and D)
F) B) and C)

Question 19

The process that separates enantiomers is called ______________.

Accepted Answer

The answer of The process that separates enantiomers is called...

Question 20

Which of the following is the definition of a pair of diastereomers?

Accepted Answer

A)  A pair of structures that are superposable mirror images of one another
B)  A pair of stereoisomers that are non-superposable mirror images of one another
C)  A pair of stereoisomers that are not mirror images of one another
D)  A pair of stereoisomers that have equal specific rotationsE) B) and C)
F) A) and D)

Exam 3: Stereoisomerism and Chirality

How many stereoisomers of 2,4-dimethylpentane, (CH₃) ₂CHCH₂CH(CH₃) ₂, exist?

Correct Answer
verified

Complete the following diagram so that it represents (S)-2-butanol.

Correct Answer
verified

______________ are stereoisomers that are not mirror images.

Correct Answer
verified
Diastereom...
View Answer

The following structures depicts (__)-3-ethyl-2,3-dimethylhexane.

Correct Answer
verified

Complete the following Newman projection so that it represents (2R,3S)-2,3-dibromobutane.

Correct Answer
verified

Which of the following structures is different from the other three?

Correct Answer
verified

Which of the following Newman projections represents (2R,3R) -dibromobutane?

Correct Answer
verified

Which of the following have the S configuration?

Correct Answer
verified

Which of the following structures does not have a plane of symmetry?

Correct Answer
verified

How many stereoisomers of 4-chloro-2-methylpentane (CH₃) ₂CHCH₂CHClCH₃, exist?

Correct Answer
verified

Which of the following is the definition of chirality?

Correct Answer
verified

The process that separates enantiomers is called ______________.

Correct Answer
verified

How much of the R enantiomer is present in 10 g of a mixture which has an enantiomeric excess of 60% of the R isomer?

Correct Answer
verified

Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Correct Answer
verified

The absolute configurations around C-2 and C-3 in the following Fischer projection are, respectively, ____. (Enter the two configurations separated by a comma.)

Correct Answer
verified

What is the correct order of the Cahn-Ingold-Prelog ranking of the following substituents as used in assigning R and S configurations of chiral centers? (higher ranking > lower ranking) 1.-C-CH 2.-CH₂NH₂ 3.-NHCH₃ 4) -CN

Correct Answer
verified

Correct Answer
verified

Which of the following compounds is/are chiral?

Correct Answer
verified

Which of the following is the definition of a pair of diastereomers?

Correct Answer
verified

Complete the following zig-zag structure so that it represents (2R,3S)-3-chlorobutan-2-ol.

Correct Answer
verified

Exam 3: Stereoisomerism and Chirality

How many stereoisomers of 2,4-dimethylpentane, (CH3) 2CHCH2CH(CH3) 2, exist?

Correct AnswerverifiedShow Answer

Complete the following diagram so that it represents (S)-2-butanol.

Correct AnswerverifiedShow Answer

______________ are stereoisomers that are not mirror images.

Correct AnswerverifiedDiastereom...View AnswerShow Answer

The following structures depicts (__)-3-ethyl-2,3-dimethylhexane.

Correct AnswerverifiedShow Answer

Complete the following Newman projection so that it represents (2R,3S)-2,3-dibromobutane.

Correct AnswerverifiedShow Answer

Which of the following structures is different from the other three?

Correct AnswerverifiedShow Answer

Which of the following Newman projections represents (2R,3R) -dibromobutane?

Correct AnswerverifiedShow Answer

Which of the following have the S configuration?

Correct AnswerverifiedShow Answer

Which of the following structures does not have a plane of symmetry?

Correct AnswerverifiedShow Answer

How many stereoisomers of 4-chloro-2-methylpentane (CH3) 2CHCH2CHClCH3, exist?

Correct AnswerverifiedShow Answer

Which of the following is the definition of chirality?

Correct AnswerverifiedShow Answer

The process that separates enantiomers is called ______________.

Correct AnswerverifiedShow Answer

How much of the R enantiomer is present in 10 g of a mixture which has an enantiomeric excess of 60% of the R isomer?

Correct AnswerverifiedShow Answer

Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Correct AnswerverifiedShow Answer

The absolute configurations around C-2 and C-3 in the following Fischer projection are, respectively, ____. (Enter the two configurations separated by a comma.)

Correct AnswerverifiedShow Answer

What is the correct order of the Cahn-Ingold-Prelog ranking of the following substituents as used in assigning R and S configurations of chiral centers? (higher ranking > lower ranking) 1.-C-CH 2.-CH2NH2 3.-NHCH3 4) -CN

Correct AnswerverifiedShow Answer

A natural product having [ α\alphaα ]D = +40.3 ∘\circ∘ has been isolated and purified. Either of the following substances could be this natural product.

Correct AnswerverifiedShow Answer

Which of the following compounds is/are chiral?

Correct AnswerverifiedShow Answer

Which of the following is the definition of a pair of diastereomers?

Correct AnswerverifiedShow Answer

Complete the following zig-zag structure so that it represents (2R,3S)-3-chlorobutan-2-ol.

Correct AnswerverifiedShow Answer

How many stereoisomers of 2,4-dimethylpentane, (CH₃) ₂CHCH₂CH(CH₃) ₂, exist?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Diastereom...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many stereoisomers of 4-chloro-2-methylpentane (CH₃) ₂CHCH₂CHClCH₃, exist?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the correct order of the Cahn-Ingold-Prelog ranking of the following substituents as used in assigning R and S configurations of chiral centers? (higher ranking > lower ranking) 1.-C-CH 2.-CH₂NH₂ 3.-NHCH₃ 4) -CN

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified