Question 1

To determine the parent name for an alkane,we begin by finding the ___.

Accepted Answer

longest co

Question 2

The least 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 3

Which statement(s)is/are true about a molecule with the molecular formula C10H20, that when subjected to catalytic hydrogenation there is no consumption of hydrogen?

Accepted Answer

A) The molecule has no degrees of unstaturation. 2 
B) There is one degree of unsaturation,which happens to be a pi bond. 
C) There are two degrees of unsaturation where one is a ring and the other is a pi bond. 
D) There is one degree of unsaturation,which happens to be a ring. 
E) None of these choices. 
A) The molecule has no degrees of unstaturation. 2 
B) There is one degree of unsaturation,which happens to be a pi bond. 
C) There are two degrees of unsaturation where one is a ring and the other is a pi bond. 
D) There is one degree of unsaturation,which happens to be a ring. 
E) None of these choices.

Question 4

How many alkanes of formula C7H16 possess a quaternary carbon atom?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 5

A compound containing a triple bond between the first two carbons in the chain is called a ___.

Accepted Answer

The answer of A compound containing a triple bond between...

Question 6

Chair conformations for cyclohexane systems are always the lowest energy conformation possible.

Accepted Answer

A) True 
 B)False

Question 7

The correct IUPAC name for the following compound is:

Accepted Answer

A) 5-(1-pentanolyl)-cyclobutane 
B) 5-cyclobutyl-1-pentanol 
C) 1-cyclobutyl-5-pentanol 
D) 1-(5-pentanolyl)-cyclobutane 
E) none of these choices 
A) 5-(1-pentanolyl)-cyclobutane 
B) 5-cyclobutyl-1-pentanol 
C) 1-cyclobutyl-5-pentanol 
D) 1-(5-pentanolyl)-cyclobutane 
E) none of these choices

Question 8

Which staggered Newman projection(s),looking down the C-3-C-4 bond (C-3 in front and C-4 in back),illustrate(s)the following boxed compound?

Accepted Answer

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

Question 9

What is the name of the IUPAC name of the following compound?

Accepted Answer

A) trans-4-chlorocyclohexan-1-ol 
B) cis-1-chlorocyclohexan-4-ol 
C) trans-4-chlorocyclohexanol 
D) cis-4-chlorocyclohexanol 
E) none of these choices 
A) trans-4-chlorocyclohexan-1-ol 
B) cis-1-chlorocyclohexan-4-ol 
C) trans-4-chlorocyclohexanol 
D) cis-4-chlorocyclohexanol 
E) none of these choices

Question 10

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 11

Select the structure for cis-3-methyl-6-vinylcyclohexene.

Accepted Answer

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

Question 12

The most stable conformation of trans-1-tert-butyl-3-methylcyclohexane is the one in which:

Accepted Answer

A) the tert-butyl group is axial and the methyl group is equatorial. 
B) the methyl group is axial and the tert-butyl group is equatorial. 
C) both groups are axial. 
D) both groups are equatorial. 
E) the twist boat conformation is adopted. 
A) the tert-butyl group is axial and the methyl group is equatorial. 
B) the methyl group is axial and the tert-butyl group is equatorial. 
C) both groups are axial. 
D) both groups are equatorial. 
E) the twist boat conformation is adopted.

Question 13

What is the index of hydrogen deficiency (or degree of unsaturation)for the drug morphine?

Accepted Answer

A) 6 
B) 7 
C) 8 
D) 9 
E) 10 
A) 6 
B) 7 
C) 8 
D) 9 
E) 10

Question 14

What product is formed when 5-chlorocyclohex-3-en-1-ol is reacted with Pd/C and H2?

Accepted Answer

A) 5-chlorocyclohexanol 2 
B) 3-chlorocyclohexanol 
C) 5-chloro-3-hexanol 
D) 2-chloro-4-hexanol 
E) None of these choices. 
A) 5-chlorocyclohexanol 2 
B) 3-chlorocyclohexanol 
C) 5-chloro-3-hexanol 
D) 2-chloro-4-hexanol 
E) None of these choices.

Question 15

Which cycloalkane has the least ring strain?

Accepted Answer

A) Cyclopropane 
B) Cyclobutane 
C) Cyclopentane 
D) Cyclohexane 
E) Cycloheptane 
A) Cyclopropane 
B) Cyclobutane 
C) Cyclopentane 
D) Cyclohexane 
E) Cycloheptane

Question 16

The most stable conformation of butane is:

Accepted Answer

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

Question 17

Which of the following is a correct name which corresponds to the common name tert-pentyl alcohol?

Accepted Answer

A) 2,2-Dimethyl-1-propanol 
B) 2-Ethyl-2-propanol 
C) 2-Methyl-2-butanol 
D) 3-Methyl-1-butanol 
E) Methyl tert-butanol 
A) 2,2-Dimethyl-1-propanol 
B) 2-Ethyl-2-propanol 
C) 2-Methyl-2-butanol 
D) 3-Methyl-1-butanol 
E) Methyl tert-butanol

Question 18

The least stable conformation of butane is:

Accepted Answer

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

Question 19

How many constitutional isomers are possible for the formula C6H14?

Accepted Answer

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

Question 20

What is the index of hydrogen deficiency (or degree of unsaturation)of a compound with the molecular formula of C21H30O5?

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 6 
E) 7 
A) 3 
B) 4 
C) 5 
D) 6 
E) 7

Exam 4: Nomenclature and Conformations of Alkanes and Cycloalkanes

To determine the parent name for an alkane,we begin by finding the ___.

The least 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):

Which statement(s)is/are true about a molecule with the molecular formula C10H20, that when subjected to catalytic hydrogenation there is no consumption of hydrogen?

How many alkanes of formula C7H16 possess a quaternary carbon atom?

A compound containing a triple bond between the first two carbons in the chain is called a ___.

Chair conformations for cyclohexane systems are always the lowest energy conformation possible.

The correct IUPAC name for the following compound is:

Which staggered Newman projection(s),looking down the C-3-C-4 bond (C-3 in front and C-4 in back),illustrate(s)the following boxed compound?

What is the name of the IUPAC name of the following compound?

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

Select the structure for cis-3-methyl-6-vinylcyclohexene.

The most stable conformation of trans-1-tert-butyl-3-methylcyclohexane is the one in which:

What is the index of hydrogen deficiency (or degree of unsaturation)for the drug morphine?

What product is formed when 5-chlorocyclohex-3-en-1-ol is reacted with Pd/C and H2?

Which cycloalkane has the least ring strain?

The most stable conformation of butane is:

Which of the following is a correct name which corresponds to the common name tert-pentyl alcohol?

The least stable conformation of butane is:

How many constitutional isomers are possible for the formula C6H14?

What is the index of hydrogen deficiency (or degree of unsaturation)of a compound with the molecular formula of C21H30O5?

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

Which statement(s)is/are true about a molecule with the molecular formula C₁₀H₂₀_, that when subjected to catalytic hydrogenation there is no consumption of hydrogen?

How many alkanes of formula C₇H₁₆ possess a quaternary carbon atom?

What product is formed when 5-chlorocyclohex-3-en-1-ol is reacted with Pd/C and H₂?

How many constitutional isomers are possible for the formula C₆H₁₄?

What is the index of hydrogen deficiency (or degree of unsaturation)of a compound with the molecular formula of C₂₁H₃₀O₅?