Deck 3: An Introduction to Organic Compounds Nomenclature, Physical Properties, and Structure

Question 1

How many of the nine constitutional isomers of heptane lack a secondary carbon?

A) 0
B) 1
C) 2
D) 3
E) 4

Answer 1

1

Question 2

Which of the following names is correct?

A) 2-bromo-5-ethylhexane
B) 2-ethyl-5-bromohexane
C) 5-ethyl-2-bromohexane
D) 2-bromo-5-methylheptane
E) 5-methyl-2-bromoheptane

Answer 2

2-bromo-5-methylheptane

Question 3

Choose the best name for the following compound.

A) dimethoxyethyl ether
B) dimethoxyethane
C) 1,2-dimethoxyethane
D) 1,3-dioxobutane
E) 2-methoxyethyl methyl ether

Answer 3

1,2-dimethoxyethane

Question 4

Choose the best name for the following compound.

A) 1-ethyl-2-methylcyclopentanol
B) 1-ethyl-2-methyl-3-cyclopentanol
C) 3-methyl-4-ethylcyclopentanol
D) 4-ethyl-3-methylcyclopentanol
E) 3-ethyl-4-methylcyclopentanol

Question 5

Choose the best name for the following compound.

A) N,N,N-diethylisopropylamine
B) N,N-diethyl-2-propanamine
C) diethyl-2-propanamine
D) diethyl-N-propanamine
E) N,N-diethylpropylamine

Question 6

Which of the following is a tertiary amine?

A)
B)
C)
D)
E)

Question 7

Which of the following trimethylcyclohexanes has the most stable chair conformer?

A)
B)
C)
D)
E)

Question 8

Which of the following dimethylcyclohexanes has the most stable chair conformer?

A)
B)
C)
D)
E)

Question 9

Why, primarily, does tetrahydrofuran (THF, bp 66 °C) have a higher boiling point than cyclopentane (bp 49 °C)?

A) increased London dispersion forces
B) hydrogen bonding
C) increased mass
D) decreased London dispersion forces
E) dipole-dipole interactions

Question 10

Rank the alcohols, all of similar molecular mass, in order of decreasing boiling point.
1 CH₃CH₂CH₂CH₂OH
2 CH₃CH₂(CH₃)CHOH
3 (CH₃)₃COH
4 HOCH₂CH₂CH₂OH

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