Question 1

The most stable conformation of 3-bromo-2-methylpentane,viewed through the C-3-C-4 bond (i.e.,C-3 in the front,C-4 in the back):

Accepted Answer

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

Question 2

What is the index of hydrogen deficiency (or degree of unsaturation)of the following molecule?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Question 3

What are the four possible parts of an IUPAC name?

Accepted Answer

locant,pre

Question 4

Give the IUPAC name corresponding to the following structure:

Accepted Answer

3-(2-bromo

Question 5

Give the IUPAC name corresponding to the following structure:

Accepted Answer

cis-1-ethe

Question 6

Which of the following will have the same energy after undergoing ring flip?

Accepted Answer

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

Question 7

Which conformation(s)show(s)the bromines in a gauche orientation for 2,3-dibromobutane,viewed through the C-2-C-3 bond?

Accepted Answer

A) I and II only 
B) III and IV only 
C) I and V only 
D) II only 
E) None of these choices. 
A) I and II only 
B) III and IV only 
C) I and V only 
D) II only 
E) None of these choices.

Question 8

Give the IUPAC name corresponding to the following structure:

Accepted Answer

trans-1-br

Question 9

The anti conformation is by definition always the lowest energy conformation possible for a bond rotation.

Accepted Answer

A) True 
 B)False

Question 10

____ have the same molecular formula and connectivity but different arrangements of atoms in three-dimensional space.

Accepted Answer

The answer of ____ have the same molecular formula and...

Question 11

trans-1,2-Dibromocyclohexane is represented by structure(s):

Accepted Answer

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

Question 12

What is the index of hydrogen deficiency (or degree of unsaturation)of the following molecule?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Question 13

The most stable conformation of 2,3-dibromobutane,viewed through the C-2-C-3 bond :

Accepted Answer

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

Question 14

What is the name of this compound?

Accepted Answer

A) Bicyclo[2.2.2]octane 
B) Bicyclo[3.2.1]octane 
C) Bicyclo[4.1.1]octane 
D) Bicyclo[4.2.0]octane 
E) Bicyclo[3.3.0]octane 
A) Bicyclo[2.2.2]octane 
B) Bicyclo[3.2.1]octane 
C) Bicyclo[4.1.1]octane 
D) Bicyclo[4.2.0]octane 
E) Bicyclo[3.3.0]octane

Question 15

In the most stable conformation of cis-1,4-dimethylcyclohexane,the methyl groups are:

Accepted Answer

A) one axial,one equatorial. 
B) both axial. 
C) both equatorial. 
D) alternating between being both axial and both equatorial. 
E) None of these choices. 
A) one axial,one equatorial. 
B) both axial. 
C) both equatorial. 
D) alternating between being both axial and both equatorial. 
E) None of these choices.

Question 16

What is the index of hydrogen deficiency (or degree of unsaturation)of a compound with the molecular formula of C7H7NOS?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Question 17

The graph below is a plot of the relative energies of the various conformations of:

Accepted Answer

A) Ethane 
B) Propane 
C) Chloroethane 
D) 1-Chloropropane (C1-C2 rotation) 
E) Butane (C1-C2 rotation) 
A) Ethane 
B) Propane 
C) Chloroethane 
D) 1-Chloropropane (C1-C2 rotation) 
E) Butane (C1-C2 rotation)

Question 18

Which statement(s)is/are true about a molecule with the molecular formula C10H14O,that when subjected to Pd/C and H2 in ethyl acetate,there is a consumption of 2 moles of hydrogen?

Accepted Answer

A) The molecule has no degrees of unsaturation. 2 
B) There are four degrees of unsaturation,where two come from either two alkenes or one alkyne and the other two are either two rings or one ring and a carbonyl. 
C) There are two degrees of unsaturation where they were either two alkenes or one alkyne. 
D) There are four degrees of unsaturation,which come from a mixture of alkenes and alkynes,that is why four hydrogens are added. 
E) None of these choices. 
A) The molecule has no degrees of unsaturation. 2 
B) There are four degrees of unsaturation,where two come from either two alkenes or one alkyne and the other two are either two rings or one ring and a carbonyl. 
C) There are two degrees of unsaturation where they were either two alkenes or one alkyne. 
D) There are four degrees of unsaturation,which come from a mixture of alkenes and alkynes,that is why four hydrogens are added. 
E) None of these choices.

Question 19

What is the major product formed after treating the following molecule with excess H2 in the presence of Pd/C catalyst?

Accepted Answer

A) cis-3-penten-1-ol 
B) cis-2-penten-5-ol 
C) 1-pentanol 
D) pentane 
E) none of these choices 
A) cis-3-penten-1-ol 
B) cis-2-penten-5-ol 
C) 1-pentanol 
D) pentane 
E) none of these choices

Question 20

How many moles of hydrogen (H2)will react with 3-cyclobutylpropan-1-ol?

Accepted Answer

A) 1 2 
B) 2 
C) 3 
D) 4 
E) None of these choices. 
A) 1 2 
B) 2 
C) 3 
D) 4 
E) None of these choices.

Exam 4: Nomenclature and Conformations of Alkanes and Cycloalkanes

The most stable conformation of 3-bromo-2-methylpentane,viewed through the C-3-C-4 bond (i.e.,C-3 in the front,C-4 in the back):

What is the index of hydrogen deficiency (or degree of unsaturation)of the following molecule?

What are the four possible parts of an IUPAC name?

Give the IUPAC name corresponding to the following structure:

Give the IUPAC name corresponding to the following structure:

Which of the following will have the same energy after undergoing ring flip?

Which conformation(s)show(s)the bromines in a gauche orientation for 2,3-dibromobutane,viewed through the C-2-C-3 bond?

Give the IUPAC name corresponding to the following structure:

The anti conformation is by definition always the lowest energy conformation possible for a bond rotation.

____ have the same molecular formula and connectivity but different arrangements of atoms in three-dimensional space.

trans-1,2-Dibromocyclohexane is represented by structure(s):

What is the index of hydrogen deficiency (or degree of unsaturation)of the following molecule?

The most stable conformation of 2,3-dibromobutane,viewed through the C-2-C-3 bond :

What is the name of this compound?

In the most stable conformation of cis-1,4-dimethylcyclohexane,the methyl groups are:

What is the index of hydrogen deficiency (or degree of unsaturation)of a compound with the molecular formula of C7H7NOS?

The graph below is a plot of the relative energies of the various conformations of:

Which statement(s)is/are true about a molecule with the molecular formula C10H14O,that when subjected to Pd/C and H2 in ethyl acetate,there is a consumption of 2 moles of hydrogen?

What is the major product formed after treating the following molecule with excess H2 in the presence of Pd/C catalyst?

How many moles of hydrogen (H2)will react with 3-cyclobutylpropan-1-ol?

The Basics

Families of Carbon

Acids and Bases

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

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

What is the index of hydrogen deficiency (or degree of unsaturation)of a compound with the molecular formula of C₇H₇NOS?

Which statement(s)is/are true about a molecule with the molecular formula C₁₀H₁₄O,that when subjected to Pd/C and H₂ in ethyl acetate,there is a consumption of 2 moles of hydrogen?

What is the major product formed after treating the following molecule with excess H₂in the presence of Pd/C catalyst?

How many moles of hydrogen (H₂)will react with 3-cyclobutylpropan-1-ol?