Question 1

Provide the name of the compound below.

Accepted Answer

sec-butylc

Question 2

Draw the most stable conformation of trans-1-tert-butyl-3-ethylcyclohexane.

Accepted Answer

The answer of Draw the most stable conformation of trans-1-tert-butyl-3-ethylcyclohexane....

Question 3

Name the haloalkane shown.

Accepted Answer

The answer of Name the haloalkane shown.  ...

Question 4

Draw an acceptable structure for 3-ethyl-3-methylhexane.

Accepted Answer

The answer of Draw an acceptable structure for 3-ethyl-3-methylhexane....

Question 5

A student named the following molecule "4-isobutylheptane." Why is this incorrect? What is the correct name?

Accepted Answer

2-methyl-4-propylheptane is the correct

Question 6

What element of ring strain exists in cyclooctane but not in cyclopropane?

Accepted Answer

The answer of What element of ring strain exists in...

Question 7

View a butane molecule along the C2-C3 bond and provide a Newman projection of the lowest energy conformer.

Accepted Answer

Question 8

Which of the statements below accurately describe(s) alkanes?

Accepted Answer

A)  Alkanes are hydrocarbons which contain only single bonds. 
B)  Alkanes belong to the class of unsaturated hydrocarbons. 
C)  Alkanes are the simplest and least reactive class of organic compounds. 
D)  both A and B 
E)  both A and C 
A)  Alkanes are hydrocarbons which contain only single bonds. 
B)  Alkanes belong to the class of unsaturated hydrocarbons. 
C)  Alkanes are the simplest and least reactive class of organic compounds. 
D)  both A and B 
E)  both A and C

Question 9

Arrange the following conformers of butane in order of energy, lowest to highest: eclipsed, totally eclipsed, gauche, and anti.

Accepted Answer

anti < gau

Question 10

Provide an acceptable structure for spiro [4.4]nonane.

Accepted Answer

The answer of Provide an acceptable structure for spiro [4.4]nonane....

Question 11

Provide an acceptable name for the alkane shown below.

Accepted Answer

4-isopropy

Question 12

Give the IUPAC name for the cycloalkane shown below.

Accepted Answer

cis-1-isop

Question 13

Draw the Newman projection of the highest energy conformation that results from rotation about the C2-C3 bond of 2-methylbutane.

Accepted Answer

The answer of Draw the Newman projection of the highest...

Question 14

Describe the sources of angle strain and torsional strain present in cyclopropane.

Accepted Answer

The angle strain arises from t

Question 15

Which of the following correctly lists the conformations of cyclohexane in order of increasing energy?

Accepted Answer

A)  chair < boat < twist < half-chair 
B)  half-chair < boat < twist < chair 
C)  chair < twist < half-chair < boat 
D)  chair < twist < boat < half-chair 
E)  half-chair < twist < boat < chair 
A)  chair < boat < twist < half-chair 
B)  half-chair < boat < twist < chair 
C)  chair < twist < half-chair < boat 
D)  chair < twist < boat < half-chair 
E)  half-chair < twist < boat < chair

Question 16

Provide the name of the compound shown.

Accepted Answer

2,2,7-trichloro-4-et

Question 17

Which of the following cycloalkanes exhibits the greatest molar heat of combustion?

Accepted Answer

A)  cyclooctane 
B)  cycloheptane 
C)  cyclohexane 
D)  cyclobutane 
E)  cyclopropane 
A)  cyclooctane 
B)  cycloheptane 
C)  cyclohexane 
D)  cyclobutane 
E)  cyclopropane

Question 18

________ is the n-alkane of greatest molecular weight which is a gas at room temperature and pressure.

Accepted Answer

The answer of ________ is the n-alkane of greatest molecular...

Question 19

The twisted boat conformation of cyclohexane is actually a slightly lower energy conformation than the boat conformation. Which of the following accurately describes one factor involved in this structural behavior?

Accepted Answer

A)  lower angle strain in the boat 
B)  higher torsional strain in the twisted boat 
C)  fewer unfavorable steric factors in the twisted boat 
D)  increased rotational freedom in the boat 
E)  lower bond strain in the boat 
A)  lower angle strain in the boat 
B)  higher torsional strain in the twisted boat 
C)  fewer unfavorable steric factors in the twisted boat 
D)  increased rotational freedom in the boat 
E)  lower bond strain in the boat

Question 20

Consider the equilibrium shown below. When one looks at the equilibrium where X = CH3 and the one where X = CH(CH3)2, how do the values of the equilibrium constants (Ks) compare?

Accepted Answer

A)  The Ks are equal. 
B)  The K where X = CH3 is greater. 
C)  The K where X = CH(CH3)2 is greater. 
D)  The Ks differ only slightly and are both less than 1. 
A)  The Ks are equal. 
B)  The K where X = CH3 is greater. 
C)  The K where X = CH(CH3)2 is greater. 
D)  The Ks differ only slightly and are both less than 1.

Exam 3: Structure and Stereochemistry of Alkanes

Provide the name of the compound below.

Draw the most stable conformation of trans-1-tert-butyl-3-ethylcyclohexane.

Name the haloalkane shown.

Draw an acceptable structure for 3-ethyl-3-methylhexane.

A student named the following molecule "4-isobutylheptane." Why is this incorrect? What is the correct name?

What element of ring strain exists in cyclooctane but not in cyclopropane?

View a butane molecule along the C2-C3 bond and provide a Newman projection of the lowest energy conformer.

Which of the statements below accurately describe(s) alkanes?

Arrange the following conformers of butane in order of energy, lowest to highest: eclipsed, totally eclipsed, gauche, and anti.

Provide an acceptable structure for spiro [4.4]nonane.

Provide an acceptable name for the alkane shown below.

Give the IUPAC name for the cycloalkane shown below.

Draw the Newman projection of the highest energy conformation that results from rotation about the C2-C3 bond of 2-methylbutane.

Describe the sources of angle strain and torsional strain present in cyclopropane.

Which of the following correctly lists the conformations of cyclohexane in order of increasing energy?

Provide the name of the compound shown.

Which of the following cycloalkanes exhibits the greatest molar heat of combustion?

________ is the n-alkane of greatest molecular weight which is a gas at room temperature and pressure.

The twisted boat conformation of cyclohexane is actually a slightly lower energy conformation than the boat conformation. Which of the following accurately describes one factor involved in this structural behavior?

Consider the equilibrium shown below. When one looks at the equilibrium where X = CH3 and the one where X = CH(CH3)2, how do the values of the equilibrium constants (Ks) compare?

Structure and Bonding

Acids and Bases; Functional Groups

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

View a butane molecule along the C₂-C₃ bond and provide a Newman projection of the lowest energy conformer.

Consider the equilibrium shown below. When one looks at the equilibrium where X = CH₃ and the one where X = CH(CH₃)₂, how do the values of the equilibrium constants (Ks) compare?