Filters
Question type
Study Flashcards

D-Pinitol is an interesting hexahydroxycyclohexane,whose structure is shown below.D-Pinitol is an interesting hexahydroxycyclohexane,whose structure is shown below. On the templates provided,draw the two chair conformations that are in equilibrium for D-pinitol.Circle the most stable conformation. On the templates provided,draw the two chair conformations that are in equilibrium for D-pinitol.Circle the most stable conformation. D-Pinitol is an interesting hexahydroxycyclohexane,whose structure is shown below. On the templates provided,draw the two chair conformations that are in equilibrium for D-pinitol.Circle the most stable conformation.

Correct Answer

verifed

verified

Which one of the following structures represents a different compound from the other three?


A) Which one of the following structures represents a different compound from the other three? A) B) C) D)
B) Which one of the following structures represents a different compound from the other three? A) B) C) D)
C) Which one of the following structures represents a different compound from the other three? A) B) C) D)
D) Which one of the following structures represents a different compound from the other three? A) B) C) D)

E) A) and B)
F) B) and D)

Correct Answer

verifed

verified

If the 1,3-diaxial strain for an ethyl group is 4.0 kJ/mol,what is the energy difference between the axial and equatorial conformations of ethylcyclohexane?


A) 2.0 kJ/mol
B) 4.0 kJ/mol
C) 8.0 kJ/mol
D) 16.0 kJ/mol
E) Cannot be determined from the 1,3-diaxial strain

F) A) and D)
G) None of the above

Correct Answer

verifed

verified

Which of the following cycloalkanes has the most ring strain?


A) cyclopropane
B) cyclobutane
C) cyclopentane
D) cyclohexane

E) C) and D)
F) A) and B)

Correct Answer

verifed

verified

Which of the following compounds can adopt a chair conformation in which there are no axial methyl groups?


A) 1,1-dimethylcyclohexane
B) cis-1,2-dimethylcyclohexane
C) trans-1,2-dimethylcyclohexane
D) trans-1,3-dimethylcyclohexane

E) A) and D)
F) All of the above

Correct Answer

verifed

verified

Which of the following statements is not true regarding the conformation of substituted cyclohexanes?


A) ring flip of substituted cyclohexanes flips the axial and equatorial positions of substituents
B) substituted cyclohexanes are destabilized by 1,3-diaxial interactions
C) the twist-boat conformation of cyclohexane is more stable than the chair conformation
D) the relative amount of two conformations of substituted cyclohexanes can be determined from the difference in strain energy

E) B) and D)
F) B) and C)

Correct Answer

verifed

verified

C

In which of the following compounds would the carbon-carbon bond angle diverge the greatest from 109 ∘\circ ?


A) cyclodecane
B) cyclooctane
C) cyclopentane
D) cyclopropane

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

Correct Answer

verifed

verified

In cycloheptane,which of the following factors contributes the least to the stability of the ring conformation?


A) torsional strain
B) angle strain
C) steric strain
D) all of these contribute to an approximately equal degree

E) A) and B)
F) C) and D)

Correct Answer

verifed

verified

Which of the following structures represents trans-1,3-dimethylcyclohexane?


A) Which of the following structures represents trans-1,3-dimethylcyclohexane? A) B) C) D)
B) Which of the following structures represents trans-1,3-dimethylcyclohexane? A) B) C) D)
C) Which of the following structures represents trans-1,3-dimethylcyclohexane? A) B) C) D)
D) Which of the following structures represents trans-1,3-dimethylcyclohexane? A) B) C) D)

E) All of the above
F) B) and C)

Correct Answer

verifed

verified

Which of the following structures represents trans-1,2-dimethylcyclohexane?


A) Which of the following structures represents trans-1,2-dimethylcyclohexane? A) B) C) D)
B) Which of the following structures represents trans-1,2-dimethylcyclohexane? A) B) C) D)
C) Which of the following structures represents trans-1,2-dimethylcyclohexane? A) B) C) D)
D) Which of the following structures represents trans-1,2-dimethylcyclohexane? A) B) C) D)

E) B) and C)
F) C) and D)

Correct Answer

verifed

verified

Substitution of which of the following groups on a cycloalkane would result in the greatest amount of steric strain?


A) bromo
B) ethyl
C) isopropyl
D) hydroxyl

E) A) and D)
F) All of the above

Correct Answer

verifed

verified

Instructions: (-)-Menthol is responsible for the characteristic flavor and taste of peppermint.The structure of (-)-menthol is shown below.Use this information to answer the following question. Instructions: (-)-Menthol is responsible for the characteristic flavor and taste of peppermint.The structure of (-)-menthol is shown below.Use this information to answer the following question. -Refer to instructions.On the chair template provided below,draw the two chair conformations that are in equilibrium for (-)-menthol. -Refer to instructions.On the chair template provided below,draw the two chair conformations that are in equilibrium for (-)-menthol. Instructions: (-)-Menthol is responsible for the characteristic flavor and taste of peppermint.The structure of (-)-menthol is shown below.Use this information to answer the following question. -Refer to instructions.On the chair template provided below,draw the two chair conformations that are in equilibrium for (-)-menthol.

Correct Answer

verifed

verified

Which of the following cycloalkanes would be the most similar to its open chain counterpart?


A) cyclodecane
B) cyclooctane
C) cyclopentane
D) cyclopropane

E) All of the above
F) C) and D)

Correct Answer

verifed

verified

Which one of the following structures represents a different compound from the other three?


A) Which one of the following structures represents a different compound from the other three? A) B) C) D)
B) Which one of the following structures represents a different compound from the other three? A) B) C) D)
C) Which one of the following structures represents a different compound from the other three? A) B) C) D)
D) Which one of the following structures represents a different compound from the other three? A) B) C) D)

E) B) and C)
F) B) and D)

Correct Answer

verifed

verified

Which of the following is the most stable conformation of cis-1-isopropyl-3-methylcyclohexane?


A) Which of the following is the most stable conformation of cis-1-isopropyl-3-methylcyclohexane? A) B) C) D)
B) Which of the following is the most stable conformation of cis-1-isopropyl-3-methylcyclohexane? A) B) C) D)
C) Which of the following is the most stable conformation of cis-1-isopropyl-3-methylcyclohexane? A) B) C) D)
D) Which of the following is the most stable conformation of cis-1-isopropyl-3-methylcyclohexane? A) B) C) D)

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

Correct Answer

verifed

verified

C

If cyclohexane were planar,how much torsional strain would be present in the planar molecule? Assume that the energy cost for each H«H eclipsing interaction is 4.0 kcal/mol.


A) 12.0 kJ/mol
B) 24.0 kJ/mol
C) 36.0 kJ/mol
D) 48.0 kJ/mol
E) 64.0 kJ/mol

F) C) and D)
G) A) and E)

Correct Answer

verifed

verified

Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane?


A) Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane? A) B) C) D)
B) Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane? A) B) C) D)
C) Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane? A) B) C) D)
D) Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane? A) B) C) D)

E) A) and B)
F) A) and C)

Correct Answer

verifed

verified

D

What is the energy difference between the two chair conformations of the following compound that is due to steric strain? Cis-1-bromo-4-isopropylcyclohexane What is the energy difference between the two chair conformations of the following compound that is due to steric strain? Cis-1-bromo-4-isopropylcyclohexane A) 7.2 kJ/mol B) 5.6 kJ/mol C) 9.2 kJ/mol D) 11.2 kJ/mol


A) 7.2 kJ/mol
B) 5.6 kJ/mol
C) 9.2 kJ/mol
D) 11.2 kJ/mol

E) A) and B)
F) A) and C)

Correct Answer

verifed

verified

Showing 1 - 18 of 18

Related Exams

Exam 1

Structure and Bonding

30 Questions

Exam 2

Polar Covalent Bonds: Acids and Bases

35 Questions

Exam 3

Organic Compounds: Alkanes and Their Stereochemistry

32 Questions

Exam 5

Stereochemistry at Tetrahedral Centers

33 Questions

Exam 6

An Overview of Organic Reactions

32 Questions

Exam 7

Alkenes and Alkynes

34 Questions

Exam 8

Reactions of Alkenes and Alkynes

37 Questions

Exam 9

Aromatic Compounds

36 Questions

Exam 10

Structure Determination: Mass Spectrometry,infrared Spectroscopy,and Ultraviolet Spectroscopy

41 Questions

Exam 11

Structure Determination: Nuclear Magnetic Resonance Spectroscopy

37 Questions

Exam 12

Organohalides: Nucleophilic Substitutions and Eliminations

37 Questions

Exam 13

Alcohols,phenols,and Thiols: Ethers and Sulfides

19 Questions

Exam 14

Aldehydes and Ketones: Nucleophilic Addition Reactions

30 Questions

Exam 15

Carboxylic Acids and Nitriles

23 Questions

Exam 16

Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Reactions

42 Questions

Exam 17

Carbonyl Alpha-Substitution and Condensation Reactions

84 Questions

Exam 18

Amines and Heterocycles

28 Questions

Exam 19

Biomolecules: Amino Acids,peptides,and Proteins

36 Questions

Exam 20

Amino Acid Metabolism

34 Questions

Exam 21

Biomolecules: Carbohydrates

42 Questions

Exam 22

Carbohydrate Metabolism

41 Questions

Exam 23

Biomolecules: Lipids and Their Metabolism

31 Questions

Exam 24

Biomolecules: Nucleic Acids and Their Metabolism

23 Questions

Show Answer