Question 1

Which of the following is not a property of ethers?

Accepted Answer

A)  They dissolve a wide range of polar substances. 
B)  They have relatively high boiling points for their molecular weights. 
C)  They are nonhydroxylic. 
D)  They dissolve a wide range of nonpolar substances. 
E)  They are normally unreactive toward strong bases. 
A)  They dissolve a wide range of polar substances. 
B)  They have relatively high boiling points for their molecular weights. 
C)  They are nonhydroxylic. 
D)  They dissolve a wide range of nonpolar substances. 
E)  They are normally unreactive toward strong bases. B

Question 2

Provide the major organic product of the following.

Accepted Answer

The answer of Provide the major organic product of the...

Question 3

Which of the following reactions or series of reactions will lead to the formation of methoxycyclohexane?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)    D

Question 4

Suggest a reasonable mechanism for the reaction shown below.

Accepted Answer

The answer of Suggest a reasonable mechanism for the reaction...

Question 5

Show the reagents necessary to perform the synthesis shown below.

Accepted Answer

1) CH₃CH₂MgB

Question 6

Show the reagents necessary to prepare 1-ethoxy-1-methylcyclopentane from 1-methylcyclopentene.

Accepted Answer

1) Hg(OAc)

Question 7

Which pair of reagents would produce the highest yield of (R)-2-ethoxybutane?

Accepted Answer

A)  sodium (S)-2-butoxide + iodoethane 
B)  sodium (R)-2-butoxide + iodoethane 
C)  sodium ethoxide + (S)-2-iodobutane 
D)  sodium ethoxide + (R)-2-iodobutane 
E)  Both B and C would work equally well. 
A)  sodium (S)-2-butoxide + iodoethane 
B)  sodium (R)-2-butoxide + iodoethane 
C)  sodium ethoxide + (S)-2-iodobutane 
D)  sodium ethoxide + (R)-2-iodobutane 
E)  Both B and C would work equally well.

Question 8

Propose a structure for the ether of formula C4H10O with the following 1H NMR signals:
δ 0.95 (triplet, 3H), 1.52 (multiplet, 2H), 3.30 (singlet, 3H), 3.40 (triplet, 2H) (ppm).

Accepted Answer

Question 9

Provide the major organic product(s) in the reaction below.

Accepted Answer

The answer of Provide the major organic product(s) in the...

Question 10

Provide the major organic product in the reaction below.
HOCH2(CH2)2CH2Br

Accepted Answer

Question 11

Show the reagents necessary to prepare trans-2-deuteriocyclohexan-1-ol from cyclohexene.

Accepted Answer

The answer of Show the reagents necessary to prepare trans-2-deuteriocyclohexan-1-ol...

Question 12

Provide the major organic product in the reaction below.

Accepted Answer

The answer of Provide the major organic product in the...

Question 13

What compound is formed when ethylene oxide is reacted with n-pentyllithium followed by treatment with aqueous acid?

Accepted Answer

A)  1-heptanol 
B)  2-heptanol 
C)  heptanal 
D)  2-heptanone 
E)  pentanal 
A)  1-heptanol 
B)  2-heptanol 
C)  heptanal 
D)  2-heptanone 
E)  pentanal

Question 14

Provide the major organic product in the reaction below.

Accepted Answer

The answer of Provide the major organic product in the...

Question 15

What is the major difference in the structure of the product formed in a Grignard reaction when an alkyl magnesium halide (Grignard reagent) is reacted with an epoxide rather than an aldehyde or ketone followed by work-up with H3O+?

Accepted Answer

A)  The alkyl group from the Grignard reagent will be bonded to the α-carbon of the alcohol product. 
B)  The alkyl group from the Grignard reagent will be bonded to the β-carbon of the alcohol product. 
C)  The alkyl group from the Grignard reagent will form an ether product rather than an alcohol product. 
D)  Two equivalents of the Grignard will result in the bonding of two alkyl groups to the α-carbon of the alcohol product. 
E)  The epoxide will protonate the Grignard reagent resulting an alkane product. 
A)  The alkyl group from the Grignard reagent will be bonded to the α-carbon of the alcohol product. 
B)  The alkyl group from the Grignard reagent will be bonded to the β-carbon of the alcohol product. 
C)  The alkyl group from the Grignard reagent will form an ether product rather than an alcohol product. 
D)  Two equivalents of the Grignard will result in the bonding of two alkyl groups to the α-carbon of the alcohol product. 
E)  The epoxide will protonate the Grignard reagent resulting an alkane product.

Question 16

What is the hybridization of the oxygen atom in dialkyl ethers?

Accepted Answer

A)  sp3 
B)  sp2 
C)  sp 
D)  s 
E)  p 
A)  sp3 
B)  sp2 
C)  sp 
D)  s 
E)  p

Question 17

Show the reagents necessary to prepare trans-1,2-cyclopentanediol from cyclopentene.

Accepted Answer

The answer of Show the reagents necessary to prepare trans-1,2-cyclopentanediol...

Question 18

Provide the major organic product in the reaction below.

Accepted Answer

The answer of Provide the major organic product in the...

Question 19

Provide the IUPAC name of the compound shown below.

Accepted Answer

1,1-dietho

Question 20

When trans-hex-3-ene is treated with PhCO3H, the major organic product is ________.

Accepted Answer

A)  a meso epoxide 
B)  a 1:1 mixture of enantiomeric epoxides 
C)  a meso diol 
D)  a 1:1 mixture of enantiomeric diols 
E)  hexan-3-ol 
A)  a meso epoxide 
B)  a 1:1 mixture of enantiomeric epoxides 
C)  a meso diol 
D)  a 1:1 mixture of enantiomeric diols 
E)  hexan-3-ol

Exam 14: Ethers, Epoxides, and Thioethers

Which of the following is not a property of ethers?

Provide the major organic product of the following.

Which of the following reactions or series of reactions will lead to the formation of methoxycyclohexane?

Suggest a reasonable mechanism for the reaction shown below.

Show the reagents necessary to perform the synthesis shown below.

Show the reagents necessary to prepare 1-ethoxy-1-methylcyclopentane from 1-methylcyclopentene.

Which pair of reagents would produce the highest yield of (R)-2-ethoxybutane?

Propose a structure for the ether of formula C4H10O with the following 1H NMR signals: δ 0.95 (triplet, 3H), 1.52 (multiplet, 2H), 3.30 (singlet, 3H), 3.40 (triplet, 2H) (ppm).

Provide the major organic product(s) in the reaction below.

Provide the major organic product in the reaction below. HOCH2(CH2)2CH2Br

Show the reagents necessary to prepare trans-2-deuteriocyclohexan-1-ol from cyclohexene.

Provide the major organic product in the reaction below.

What compound is formed when ethylene oxide is reacted with n-pentyllithium followed by treatment with aqueous acid?

Provide the major organic product in the reaction below.

What is the major difference in the structure of the product formed in a Grignard reaction when an alkyl magnesium halide (Grignard reagent) is reacted with an epoxide rather than an aldehyde or ketone followed by work-up with H3O+?

What is the hybridization of the oxygen atom in dialkyl ethers?

Show the reagents necessary to prepare trans-1,2-cyclopentanediol from cyclopentene.

Provide the major organic product in the reaction below.

Provide the IUPAC name of the compound shown below.

When trans-hex-3-ene is treated with PhCO3H, the major organic product is ________.

Structure and Bonding

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

Propose a structure for the ether of formula C₄H₁₀O with the following ¹H NMR signals: δ 0.95 (triplet, 3H), 1.52 (multiplet, 2H), 3.30 (singlet, 3H), 3.40 (triplet, 2H) (ppm).

Provide the major organic product in the reaction below. HOCH₂(CH₂)₂CH₂Br

What is the major difference in the structure of the product formed in a Grignard reaction when an alkyl magnesium halide (Grignard reagent) is reacted with an epoxide rather than an aldehyde or ketone followed by work-up with H₃O⁺?

When trans-hex-3-ene is treated with PhCO₃H, the major organic product is ________.