Question 1

A negatively charged hydrogen atom is called a ______________.

Accepted Answer

The answer of A negatively charged hydrogen atom is called...

Question 2

A Grignard reagent will produce a primary alcohol when reacted with _____and_______.

Accepted Answer

formaldehy...

Question 3

Reaction of an alkyllithium with a ketone produces,after acid work-up,a _____________ alcohol.

Accepted Answer

The answer of Reaction of an alkyllithium with a ketone...

Question 4

The following transformation would be considered a(n) ?

Accepted Answer

A)   reduction
B)   oxidation
C)   addition
D)   elimination
E)   rearrangement

Question 5

List the following compounds in order of increasing level of oxidation:

Accepted Answer

A)   I,II,III
B)   III,II,I
C)   II,I,III
D)   III,I,II
E)   I,III,II

Question 6

Key to the usefulness of PCC/CH2Cl2 as a selective oxidant for the production of aldehydes from 1 $\degree$ alcohols is___________________.

Accepted Answer

the inability to for...

Question 7

Which of the reagents listed below would efficiently accomplish the transformation of CH3CH2CH=CHCH2CH2CH2OH into CH3CH2CH=CHCH2CH2CHO ?

Accepted Answer

A)   KMnO4(aq,alkaline) 
B)   CrO3 / H2SO4
C)   PCC in CH2Cl2
D)   Br2,CCl4
E)   Two of the above

Question 8

List the following compounds in order of increasing level of oxidation:

Accepted Answer

A)   I,II,III
B)   III,II,I
C)   II,I,III
D)   III,I,II
E)   I,III,II

Question 9

Which combination of reagents is to be preferred for the synthesis of 2,4-dimethylhexane by the Corey-Posner,Whitesides-House procedure?

Accepted Answer

A)   Lithium diisobutylcuprate + sec-butyl bromide
B)   Lithium dimethylcuprate + 2-bromo-4-methylhexane
C)   Lithium dimethylcuprate + 4-bromo-2-methylhexane
D)   Lithium diisopropylcuprate + 1-bromo-2-methylbutane
E)   Lithium di(2-methylbutyl) cuprate + isopropyl bromide

Question 10

What would be the product,D,of the following reaction sequence?

Accepted Answer

A)   2,6-Dimethylheptane
B)   2,2-Dimethylpropane
C)   2-Methylpentane
D)   2,2,5-Trimethylhexane
E)   2,2,6-Trimethylheptane

Question 11

Predict the product(s) of the following reaction sequence:

Accepted Answer

A)   A mixture of I and II
B)   A mixture of I and III
C)   A mixture of II and III
D)   A mixture of II and IV
E)   A mixture of III and IV

Question 12

List the following alkyl halides in order of increasing ease of Grignard formation:

Accepted Answer

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

Question 13

Why can we not prepare a Grignard reagent from a molecule such as 4-bromo-1-butanol?

Accepted Answer

Because Grignard reagents are extremely ...

Question 14

Which of the reagents/techniques listed below would serve as the basis for a simple chemical test to distinguish between 2-methyl-3-hexyn-1-ol and 2-methyl-5-hexyn-1-ol?

Accepted Answer

A)   CrO3 in H2SO4
B)   Cold conc.H2SO4
C)   Br2 in CCl4
D)   NaBH4
E)   IR spectroscopy

Question 15

Which of the reagents listed below would efficiently accomplish the transformation of 2-methyl-3-cyclopentenol into 2-methyl-3-cyclopentenone? 4(aq,alkaline)  B)  CrO3/H2SO4 C)  H2,Pt D)  Br2,CCl4 E)  Two of the above" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   KMnO4(aq,alkaline) 
B)   CrO3/H2SO4
C)   H2,Pt
D)   Br2,CCl4
E)   Two of the above

Question 16

What is the product,A,that would be obtained from the following reaction sequence?

Accepted Answer

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

Question 17

What is the product,A,that would be obtained from the following reaction sequence?

Accepted Answer

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

Question 18

Complete the following reaction sequence,giving structural details of all key intermediates.

Accepted Answer

The answer of Complete the following reaction sequence,giving structural details...

Question 19

NH4Cl is sometimes preferred instead of HCl or H2SO4 for "acid" work-up after Grignard reactions,particularly when the expected and desired product is a tertiary alcohol: why?

Accepted Answer

NH₄Cl provides mildly acidic co...

Question 20

When 3-methyl-3-pentanol is treated with chromic acid,

Accepted Answer

A)   the color changes from orange to blue.
B)   the color changes from purple to colorless.
C)   the purple color remains unchanged.
D)   the color changes from orange to green.
E)   the orange color remains unchanged.

Exam 12: Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Predict the product(s) of the following reaction sequence:

Correct AnswerverifiedShow Answer

A negatively charged hydrogen atom is called a ______________.

Correct AnswerverifiedShow Answer

List the following compounds in order of increasing level of oxidation:

Correct AnswerverifiedShow Answer

Reaction of an alkyllithium with a ketone produces,after acid work-up,a _____________ alcohol.

Correct AnswerverifiedShow Answer

Why can we not prepare a Grignard reagent from a molecule such as 4-bromo-1-butanol?

Correct AnswerverifiedBecause Grignard reagents are extremely ...View AnswerShow Answer

What is the product,A,that would be obtained from the following reaction sequence?

Correct AnswerverifiedShow Answer

A Grignard reagent will produce a primary alcohol when reacted with _____and_______.

Correct Answerverifiedformaldehy...View AnswerShow Answer

The following transformation would be considered a(n) ?

Correct AnswerverifiedShow Answer

Key to the usefulness of PCC/CH2Cl2 as a selective oxidant for the production of aldehydes from 1 °\degree° alcohols is___________________.

Correct Answerverifiedthe inability to for...View AnswerShow Answer

Which of the reagents listed below would efficiently accomplish the transformation of CH3CH2CH=CHCH2CH2CH2OH into CH3CH2CH=CHCH2CH2CHO ?

Correct AnswerverifiedShow Answer

Which of the reagents/techniques listed below would serve as the basis for a simple chemical test to distinguish between 2-methyl-3-hexyn-1-ol and 2-methyl-5-hexyn-1-ol?

Correct AnswerverifiedShow Answer

Complete the following reaction sequence,giving structural details of all key intermediates.

Correct AnswerverifiedShow Answer

What would be the product,D,of the following reaction sequence?

Correct AnswerverifiedShow Answer

NH4Cl is sometimes preferred instead of HCl or H2SO4 for "acid" work-up after Grignard reactions,particularly when the expected and desired product is a tertiary alcohol: why?

Correct AnswerverifiedNH4Cl provides mildly acidic co...View AnswerShow Answer

Which combination of reagents is to be preferred for the synthesis of 2,4-dimethylhexane by the Corey-Posner,Whitesides-House procedure?

Correct AnswerverifiedShow Answer

When 3-methyl-3-pentanol is treated with chromic acid,

Correct AnswerverifiedShow Answer

List the following alkyl halides in order of increasing ease of Grignard formation:

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List the following compounds in order of increasing level of oxidation:

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What is the product,A,that would be obtained from the following reaction sequence?

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Which of the reagents listed below would efficiently accomplish the transformation of 2-methyl-3-cyclopentenol into 2-methyl-3-cyclopentenone?

Correct AnswerverifiedShow Answer

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Because Grignard reagents are extremely ...
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A Grignard reagent will produce a primary alcohol when reacted with _and___.

Correct Answer
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formaldehy...
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Key to the usefulness of PCC/CH₂Cl₂ as a selective oxidant for the production of aldehydes from 1 $\degree$ alcohols is___________________.

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the inability to for...
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Which of the reagents listed below would efficiently accomplish the transformation of CH₃CH₂CH=CHCH₂CH₂CH₂OH into CH₃CH₂CH=CHCH₂CH₂CHO ?

Correct Answer
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NH₄Cl is sometimes preferred instead of HCl or H₂SO₄ for "acid" work-up after Grignard reactions,particularly when the expected and desired product is a tertiary alcohol: why?

Correct Answer
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NH₄Cl provides mildly acidic co...
View Answer

Correct Answer
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