Question 1

What is the major product for the following reaction?

Accepted Answer

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

Question 2

What is the major product for the following reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E) More than one of these choices. 
A)    
B)    
C)    
D)    
E) More than one of these choices.

Question 3

An optically active compound,A,with the molecular formula C7H12 reacts with cold dilute KMnO4 and gives IR absorption at about 3300 cm-1.On catalytic hydrogenation,A is converted to B (C7H16)and B is also optically active.Which is a possible structure for A?

Accepted Answer

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

Question 4

Hydroxylation of cis-2-pentene with cold alkaline KMnO4 yields

Accepted Answer

A) Equal amounts of I and II. 
B) Equal amounts of II and III. 
C) Equal amounts of III and IV. 
D) I and II as major products,III and IV as minor products. 
E) All of these choices in equal amounts. 
A) Equal amounts of I and II. 
B) Equal amounts of II and III. 
C) Equal amounts of III and IV. 
D) I and II as major products,III and IV as minor products. 
E) All of these choices in equal amounts.

Question 5

A reaction in which the reactant is not necessarily chiral but still produces primarily one stereoisomeric form of the product (or a specific subset of the possible stereoisomers)is referred to as a ___ reaction.

Accepted Answer

The answer of A reaction in which the reactant is...

Question 6

What would be the major product of the following reaction?

Accepted Answer

A) Equal amounts of I and II. 
B) Equal amounts of II and III. 
C) Equal amounts of III and IV. 
D) I and II as major products,III and IV as minor products. 
E) All of these choices in equal amounts. 
A) Equal amounts of I and II. 
B) Equal amounts of II and III. 
C) Equal amounts of III and IV. 
D) I and II as major products,III and IV as minor products. 
E) All of these choices in equal amounts.

Question 7

What reagent sequence might accomplish the following transformation?

Accepted Answer

A) 1)Br2,2)excess KOH,3)H3O+ 
B) 1)HBr,2)excess KOH,3)H3O+ 
C) 1)HBr,2)excess NaNH2,3)H3O+ 
D) 1)Br2,2)excess NaNH2,3)H3O+ 
E) none of these choices 
A) 1)Br2,2)excess KOH,3)H3O+ 
B) 1)HBr,2)excess KOH,3)H3O+ 
C) 1)HBr,2)excess NaNH2,3)H3O+ 
D) 1)Br2,2)excess NaNH2,3)H3O+ 
E) none of these choices

Question 8

When a reaction that could potentially yield two or more constitutional isomers instead produces only one as the major product,the reaction is said to be ___.

Accepted Answer

The answer of When a reaction that could potentially yield...

Question 9

Treating 1-methylcyclohexene with H3O+ would yield primarily which of these?

Accepted Answer

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

Question 10

Predict the structure of product obtained when cis-2-hexene is allowed to react with Zn/CH2I2.

Accepted Answer

@#IMG-DLM& The Zn/CH₂I₂ produces a carbene which rea

Question 11

What would be the major product of the following reaction?

Accepted Answer

A) Equal amounts of I and II. 
B) Equal amounts of II and III. 
C) Equal amounts of III and IV. 
D) I and II as major products,III and IV as minor products. 
E) All of these choices in equal amounts. 
A) Equal amounts of I and II. 
B) Equal amounts of II and III. 
C) Equal amounts of III and IV. 
D) I and II as major products,III and IV as minor products. 
E) All of these choices in equal amounts.

Question 12

What is the major product for the following reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E) More than one of these choices. 
A)    
B)    
C)    
D)    
E) More than one of these choices.

Question 13

What are possible products for the following reaction?

Accepted Answer

A)    
B)    
C)    
D) Two of these choices. 
E) None of these choices. 
A)    
B)    
C)    
D) Two of these choices. 
E) None of these choices.

Question 14

What is the major product of the following reaction sequence?

Accepted Answer

A)    
B)    
C)    
D)    
E) An equal mixture of two of these choices. 
A)    
B)    
C)    
D)    
E) An equal mixture of two of these choices.

Question 15

The thermodynamic parameters at 298 K for the following reaction are given below.   
$\Delta$Hº = -64.9 kJ mol-1 Which of the following statements is true of the reaction?

Accepted Answer

A) Both $\Delta$Hº and $\Delta$Sº favor product formation. 
B) Neither $\Delta$Hº nor $\Delta$Sº favors product formation. 
C) The entropy term is unfavorable but the formation of ethyl chloride is favored. 
D) The entropy term is favorable but the formation of ethyl chloride is not favored. 
E) The sign of $\Delta$Gº indicates that the reaction cannot occur as written. 
A) Both $\Delta$Hº and $\Delta$Sº favor product formation. 
B) Neither $\Delta$Hº nor $\Delta$Sº favors product formation. 
C) The entropy term is unfavorable but the formation of ethyl chloride is favored. 
D) The entropy term is favorable but the formation of ethyl chloride is not favored. 
E) The sign of $\Delta$Gº indicates that the reaction cannot occur as written.

Question 16

What reagents might be used to convert cis-2-butene into trans-2-butene?

Accepted Answer

A) 1)Br2; 2)NaOEt,EtOH 
B) 1)HBr; 2)NaOEt,EtOH 
C) 1)H3O+,heat; 2)NaOEt,EtOH 
D) 1)H2,Pd/C,2)NaOEt,EtOH 
E) None of these choices 
A) 1)Br2; 2)NaOEt,EtOH 
B) 1)HBr; 2)NaOEt,EtOH 
C) 1)H3O+,heat; 2)NaOEt,EtOH 
D) 1)H2,Pd/C,2)NaOEt,EtOH 
E) None of these choices

Question 17

What is the major product for the following reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E) None of these choices. 
A)    
B)    
C)    
D)    
E) None of these choices.

Question 18

What is the major product of the following reaction sequence?

Accepted Answer

A)    
B)    
C)    
D)    
E) More than one of these choices. 
A)    
B)    
C)    
D)    
E) More than one of these choices.

Question 19

Which set of reagents might be used to convert bromocyclohexane into cis-1,2-cyclohexanediol?

Accepted Answer

A) 1)Potassium tert-butoxide,2)H3O+ 
B) 1)Potassium tert-butoxide,2)OsO4,pyridine then NaHSO4(aq) 
C) 1)KOH,2)KMnO4,H+,heating 
D) 1)NaOH,2)H3O+,heating 
E) none of these choices 
A) 1)Potassium tert-butoxide,2)H3O+ 
B) 1)Potassium tert-butoxide,2)OsO4,pyridine then NaHSO4(aq) 
C) 1)KOH,2)KMnO4,H+,heating 
D) 1)NaOH,2)H3O+,heating 
E) none of these choices

Question 20

Predict the final product(s)obtained when (2R,3R)-2-bromo-3-methylpentane is subjected to the following sequence of reactions,briefly explaining your rationale.Provide regiochemical and stereochemical details as relevant.
NaOC2H5/C2H5OH,heat
BH3,THF
H2O2,OH-

Accepted Answer

@#IMG-DLM& 
Heating with sodium ethoxide results i

Exam 8: Alkenes and Alkynes II

What is the major product for the following reaction?

What is the major product for the following reaction?

An optically active compound,A,with the molecular formula C7H12 reacts with cold dilute KMnO4 and gives IR absorption at about 3300 cm-1.On catalytic hydrogenation,A is converted to B (C7H16)and B is also optically active.Which is a possible structure for A?

Hydroxylation of cis-2-pentene with cold alkaline KMnO4 yields

A reaction in which the reactant is not necessarily chiral but still produces primarily one stereoisomeric form of the product (or a specific subset of the possible stereoisomers)is referred to as a ___ reaction.

What would be the major product of the following reaction?

What reagent sequence might accomplish the following transformation?

When a reaction that could potentially yield two or more constitutional isomers instead produces only one as the major product,the reaction is said to be ___.

Treating 1-methylcyclohexene with H3O+ would yield primarily which of these?

Predict the structure of product obtained when cis-2-hexene is allowed to react with Zn/CH2I2.

What would be the major product of the following reaction?

What is the major product for the following reaction?

What are possible products for the following reaction?

What is the major product of the following reaction sequence?

The thermodynamic parameters at 298 K for the following reaction are given below. Δ\DeltaΔ Hº = -64.9 kJ mol-1 Which of the following statements is true of the reaction?

What reagents might be used to convert cis-2-butene into trans-2-butene?

What is the major product for the following reaction?

What is the major product of the following reaction sequence?

Which set of reagents might be used to convert bromocyclohexane into cis-1,2-cyclohexanediol?

Predict the final product(s)obtained when (2R,3R)-2-bromo-3-methylpentane is subjected to the following sequence of reactions,briefly explaining your rationale.Provide regiochemical and stereochemical details as relevant. NaOC2H5/C2H5OH,heat BH3,THF H2O2,OH-

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

An optically active compound,A,with the molecular formula C₇H₁₂ reacts with cold dilute KMnO₄and gives IR absorption at about 3300 cm^-1.On catalytic hydrogenation,A is converted to B (C₇H₁₆)and B is also optically active.Which is a possible structure for A?

Hydroxylation of cis-2-pentene with cold alkaline KMnO₄ yields

Treating 1-methylcyclohexene with H₃O⁺ would yield primarily which of these?

Predict the structure of product obtained when cis-2-hexene is allowed to react with Zn/CH₂I₂.

Predict the final product(s)obtained when (2R,3R)-2-bromo-3-methylpentane is subjected to the following sequence of reactions,briefly explaining your rationale.Provide regiochemical and stereochemical details as relevant. NaOC₂H₅/C₂H₅OH,heat BH₃,THF H₂O₂,OH^-