Filters
Question type
Study Flashcards

How can polyalkylation be minimized in Friedel-Crafts alkylation?


A) Use a large excess of alkyl halide relative to the aromatic compound.
B) Use a large excess of benzene relative to the alkyl halide.
C) Use an alkyl halide without a Lewis acid catalyst.
D) Use a large excess of the Lewis acid catalyst.

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

Correct Answer

verifed

verified

What are the two distinct pathways for nucleophilic aromatic substitution?


A) Addition-substitution and substitution-addition
B) Addition-elimination and elimination-addition
C) Addition-addition and elimination-elimination
D) Elimination-substitution and substitution-elimination

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

Correct Answer

verifed

verified

What is the major product of the following reaction? What is the major product of the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) All of the above
F) None of the above

Correct Answer

verifed

verified

What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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

Correct Answer

verifed

verified

What are the product(s) of the following reaction? What are the product(s) of the following reaction? A) Only I B) Only II C) Only I and II D) Only III


A) Only I
B) Only II
C) Only I and II
D) Only III

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

Correct Answer

verifed

verified

What is the major product of the following reaction? What is the major product of the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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

Correct Answer

verifed

verified

Why is the nitro group a meta director?


A) Because it is sterically very large.
B) Because it adds electron density to the meta position, thus activating it.
C) Because it stabilizes the intermediate cation.
D) Because it removes more electron density from the ortho and para positions than the meta position, thus deactivating the meta position less.

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

Correct Answer

verifed

verified

Which of the following halides will not work as an electrophile in a Friedel-Crafts alkylation reaction? Which of the following halides will not work as an electrophile in a Friedel-Crafts alkylation reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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

Correct Answer

verifed

verified

What is the product of the following reaction? What is the product of the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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

Correct Answer

verifed

verified

What is the electrophile in aromatic nitration?


A) NO+
B) NO2+
C) NO3+
D) NO2H

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

Correct Answer

verifed

verified

What is the first step in the general mechanism for electrophilic aromatic substitution?


A) Protonation of the aromatic ring
B) Deprotonation of the aromatic ring
C) Addition of the electrophile to the aromatic ring
D) Loss of the electrophile from the aromatic ring

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

Correct Answer

verifed

verified

Which of the following statements about nucleophilic aromatic substitution is not true?


A) Increasing the electronegativity of the halogen increases the reactivity of the aryl halide.
B) Increasing the number of electron-withdrawing groups increases the reactivity of the aryl halide.
C) Electron-withdrawing groups stabilize the intermediate carbanion, and lower the energy of the transition state.
D) When a nitro group is located meta to the halogen, the negative charge of the intermediate carbanion can be delocalized onto the NO2 group, thus stabilizing it.

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

Correct Answer

verifed

verified

What is the product of the following sequence of reactions? What is the product of the following sequence of reactions? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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

Correct Answer

verifed

verified

D

Which set of reagents would most likely bring about the following transformation? Which set of reagents would most likely bring about the following transformation? A) Br<sub>2</sub> and FeBr<sub>3</sub> B) NBS and light C) Br<sub>2</sub> in CCl<sub>4</sub> D) NaBr and H<sub>2</sub>O


A) Br2 and FeBr3
B) NBS and light
C) Br2 in CCl4
D) NaBr and H2O

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

Correct Answer

verifed

verified

What is the product of the following reaction? What is the product of the following reaction? A) I B) II C) III D) None of the above


A) I
B) II
C) III
D) None of the above

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

Correct Answer

verifed

verified

Which of the following substituents are activators in electrophilic aromatic substitution?


A) CH3O
B) Cl
C) NO2
D) HSO3

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

Correct Answer

verifed

verified

What is the best choice of reagent to bring about the following transformation? What is the best choice of reagent to bring about the following transformation? A) [1] LiAlH<sub>4</sub>; [2]H<sub>2</sub>O B) Zn (Hg) , HCl C) NH<sub>3</sub>, NaOH D) H<sub>2</sub>, Pd-C


A) [1] LiAlH4; [2]H2O
B) Zn (Hg) , HCl
C) NH3, NaOH
D) H2, Pd-C

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

Correct Answer

verifed

verified

D

What is (are) the product(s) of the following reaction? What is (are) the product(s) of the following reaction? A) Only I B) Only II C) Only III D) Only I and II


A) Only I
B) Only II
C) Only III
D) Only I and II

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

Correct Answer

verifed

verified

What is the major organic product obtained from the following reaction? What is the major organic product obtained from the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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

Correct Answer

verifed

verified

C

Rank the following compounds in order of decreasing reactivity in electrophilic aromatic substitution. Rank the following compounds in order of decreasing reactivity in electrophilic aromatic substitution. A) II > IV > I > III B) II > III > IV > I C) IV > II > I > III D) IV > I > II > III


A) II > IV > I > III
B) II > III > IV > I
C) IV > II > I > III
D) IV > I > II > III

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

Correct Answer

verifed

verified

Showing 1 - 20 of 51

Related Exams

Exam 1

Structure and Bonding

70 Questions

Exam 2

Acids and Bases

48 Questions

Exam 3

Introduction to Organic Molecules and Functional Groups

48 Questions

Exam 4

Alkanes

56 Questions

Exam 5

Stereochemistry

68 Questions

Exam 6

Understanding Organic Reactions

43 Questions

Exam 7

Alkyl Halides and Nucleophilic Substitution

64 Questions

Exam 8

Alkyl Halides and Elimination Reactions

45 Questions

Exam 9

Alcohols, Ethers and Epoxides

49 Questions

Exam 10

Alkenes

47 Questions

Exam 11

Alkynes

45 Questions

Exam 12

Oxidation and Reduction

43 Questions

Exam 13

Mass Spectrometry and Infrared Spectroscopy

42 Questions

Exam 14

Nuclear Magnetic Resonance Spectroscopy

43 Questions

Exam 15

Radical Reactions

43 Questions

Exam 16

Conjugation, Resonance, and Dienes

44 Questions

Exam 17

Benzene and Aromatic Compounds

40 Questions

Exam 19

Carboxylic Acids and the Acidity of the O-H Bond

44 Questions

Exam 20

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

53 Questions

Exam 21

Aldehydes and Ketones Nucleophilic Addition

45 Questions

Exam 22

Carboxylic Acids and Derivatives

47 Questions

Exam 23

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

41 Questions

Exam 24

Carbonyl Condensation Reactions

45 Questions

Exam 25

Amines

58 Questions

Exam 26

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

41 Questions

Exam 27

Pericyclic Reactions

52 Questions

Exam 28

Carbohydrates

41 Questions

Exam 29

Amino Acids and Proteins

41 Questions

Exam 30

Lipids

41 Questions

Exam 31

Synthetic Polymers

41 Questions

Show Answer