Question 1

Draw the products of the reaction shown here, including stereochemistry.

Accepted Answer

The answer of Draw the products of the reaction shown...

Question 2

Which of the structures shown is in the s-cis conformation?

Accepted Answer

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

Question 3

Devise a multistep synthesis for the following transformation.You may use any organic or inorganic reagents of your choice.Include the reagents necessary for each step and the product of each step.

Accepted Answer

The answer of Devise a multistep synthesis for the following...

Question 4

Rate the following three C7H12 isomers from lowest to highest enthalpy of hydrogenation.

Accepted Answer

In order o

Question 5

Which of the following structures is the dienophile used to make the molecule shown here?

Accepted Answer

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

Question 6

Draw a mechanism for the formation of the product resulting from 1,2 addition of HBr to the
molecule shown here.Include all lone pairs of electrons, curved arrows, and formal charges.

Accepted Answer

The answer of Draw a mechanism for the formation of...

Question 7

Draw the product of the reaction shown here.

Accepted Answer

The answer of Draw the product of the reaction shown...

Question 8

Rank these dienes in order of increasing heats of hydrogenation.

Accepted Answer

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

Question 9

Draw the endo product of the Diels-Alder reaction shown here.

Accepted Answer

The answer of Draw the endo product of the Diels-Alder...

Question 10

How many nodes are there in the highest energy   molecular orbital for  1,3,5 -hexatriene?

Accepted Answer

A)  0 
B)  2 
C)  3 
D)  5 
E)  6 
A)  0 
B)  2 
C)  3 
D)  5 
E)  6

Question 11

Which of the following structures is chiral?

Accepted Answer

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

Question 12

Which of the following words best describes the major product(s) of the following reaction?

Accepted Answer

A)  structural isomers 
B)  a single compound 
C)  racemic mixture 
D)  diastereomers 
E)  an unequal mixture of enantiomers 
A)  structural isomers 
B)  a single compound 
C)  racemic mixture 
D)  diastereomers 
E)  an unequal mixture of enantiomers

Question 13

Draw the major product in the following reaction.

Accepted Answer

The answer of Draw the major product in the following...

Question 14

Which of the following structures is a ketene?

Accepted Answer

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

Question 15

From left to right, what is the approximate hybridization of the indicated carbons in the structure shown here?

Accepted Answer

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

Question 16

Which of the following do you expect to react fastest in an     reaction with cyanide ion?

Accepted Answer

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

Question 17

Which of the following compounds gives only one constitutional isomer when it undergoes solvolysis in water? (You may ignore stereochemistry for the purposes of this question.)

Accepted Answer

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

Question 18

Estimate the enthalpy change for the reaction shown here using the bond dissociation energies
given.

Accepted Answer

The answer of Estimate the enthalpy change for the reaction...

Question 19

Which of the structures shown is in the s-trans conformation?

Accepted Answer

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

Question 20

Which of the following structures is the product of the reaction shown here?

Accepted Answer

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

Exam 13: Dienes and the Allyl System: 2p Orbitals in Conjugation

Draw the products of the reaction shown here, including stereochemistry.

Which of the structures shown is in the s-cis conformation?

Devise a multistep synthesis for the following transformation.You may use any organic or inorganic reagents of your choice.Include the reagents necessary for each step and the product of each step.

Rate the following three C7H12 isomers from lowest to highest enthalpy of hydrogenation.

Which of the following structures is the dienophile used to make the molecule shown here?

Draw a mechanism for the formation of the product resulting from 1,2 addition of HBr to the molecule shown here.Include all lone pairs of electrons, curved arrows, and formal charges.

Draw the product of the reaction shown here.

Rank these dienes in order of increasing heats of hydrogenation.

Draw the endo product of the Diels-Alder reaction shown here.

How many nodes are there in the highest energy molecular orbital for 1,3,5 -hexatriene?

Which of the following structures is chiral?

Which of the following words best describes the major product(s) of the following reaction?

Draw the major product in the following reaction.

Which of the following structures is a ketene?

From left to right, what is the approximate hybridization of the indicated carbons in the structure shown here?

Which of the following do you expect to react fastest in an reaction with cyanide ion?

Which of the following compounds gives only one constitutional isomer when it undergoes solvolysis in water? (You may ignore stereochemistry for the purposes of this question.)

Estimate the enthalpy change for the reaction shown here using the bond dissociation energies given.

Which of the structures shown is in the s-trans conformation?

Which of the following structures is the product of the reaction shown here?

Atoms and Molecules; Orbitals and Bonding

Alkanes

Alkenes and Alkynes

Stereochemistry

Rings

Substituted Alkanes: Alkyl Halides, Alcohols, Amines, Ethers,thiols, and Thioethers

Substitution Reactions: the Sn2 and Sn1 Reactions

Elimination Reactions: the E1 and E2 Reactions

Analytical Chemistry: Spectroscopy

Electrophilic Additions to Alkenes

More Additions to Bonds

Radical Reactions

Aromaticity

Substitution Reactions of Aromatic Compounds

Carbonyl Chemistry 1: Addition Reactions

Carboxylic Acids

Derivatives of Carboxylic Acids: Acyl Compounds

Carbonyl Chemistry 2: Reactions at the Α Position

Special Topic: Carbohydrates

Special Topic: Bio-Organic Chemistry

Special Topic: Amino Acids and Polyamino Acids Peptides and Proteins

Special Topic: Reactions Controlled by Orbital Symmetry

Special Topic: Intramolecular Reactions and Neighboring Group Participation

Filters

Rate the following three C₇H₁₂isomers from lowest to highest enthalpy of hydrogenation.