Question 1

Provide the structure of o-bromostyrene.

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Question 2

Provide the structure of 4-isopropylbenzaldehyde.

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Question 3

Which of the following compounds has the lowest boiling point?

Accepted Answer

p-Dichlorobenzene has the lowest boiling point due to its symmetrical structure, which leads to weaker intermolecular forces compared to the other isomers.

Question 4

Which of the following compounds has the most signals in the proton-decoupled ¹³C NMR spectrum?

Accepted Answer

m-Dibromobenzene has the most signals in the proton-decoupled 13C NMR spectrum because it has the least symmetry among the given compounds, resulting in more unique carbon environments.

Question 5

Provide the structure of 2-bromo-4-chlorobenzoic acid.

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Question 6

Provide the name of the compound shown below.

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Question 7

In the mass spectrum of isobutylbenzene, the base peak occurs at m/z ________.

Accepted Answer

The base peak in the mass spectrum of isobutylbenzene occurs at m/z 91, which corresponds to the tropylium ion, a common fragment ion seen in the mass spectra of alkylbenzenes. This ion results from the cleavage of the side chain, leaving a highly stable aromatic cation.

Question 8

Provide the structure of m-nitrophenol.

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Question 9

In the proton NMR, in what region of the spectrum does one typically observe hydrogens bound to the aromatic ring?

Accepted Answer

Hydrogens bound to the aromatic ring typically appear in the region of 7.0-8.0 ppm in the proton NMR spectrum. This is known as the aromatic region and is characterized by a group of intense and sharp peaks.

Question 10

Correctly name the following compound.

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Question 11

In the ¹³C NMR, in what region of the spectrum does one typically observe carbons which are part of the aromatic ring?

Accepted Answer

Typically, carbons which are part of the aromatic ring are observed in the 120-150 ppm region of the spectrum.

Question 12

Provide an acceptable name for PhSO₃H.

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Question 13

Provide an acceptable name for the compound below.

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Question 14

How many peaks are in the proton spin decoupled ¹³C NMR spectrum of p-dichlorobenzene?

Accepted Answer

The proton spin decoupled ¹³C NMR spectrum of p-dichlorobenzene only has two peaks, indicating that there are only two different types of protons in the molecule.

Question 15

Provide the structure of anisole.

Accepted Answer

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Question 16

Which of the following compound has the highest melting point?

Accepted Answer

p-dichlorobenzene has the highest melting point among the options given. This is because its molecules can pack closely together in a solid state due to its symmetrical structure, leading to stronger intermolecular forces compared to the other compounds listed.

Question 17

In the UV-visible spectra of the following compounds, in which does λ_max appear at the highest wavelength?

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Question 18

Provide an acceptable name for the compound below.

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Question 19

Provide an acceptable name for the compound below.

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Question 20

Provide a correct common name for the following compound.

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Quiz 16: Aromatic Compounds

Provide the structure of o-bromostyrene.

Provide the structure of 4-isopropylbenzaldehyde.

Which of the following compounds has the lowest boiling point?

Which of the following compounds has the most signals in the proton-decoupled 13C NMR spectrum?

Provide the structure of 2-bromo-4-chlorobenzoic acid.

Provide the name of the compound shown below.

In the mass spectrum of isobutylbenzene, the base peak occurs at m/z ________.

Provide the structure of m-nitrophenol.

In the proton NMR, in what region of the spectrum does one typically observe hydrogens bound to the aromatic ring?

Correctly name the following compound.

In the 13C NMR, in what region of the spectrum does one typically observe carbons which are part of the aromatic ring?

Provide an acceptable name for PhSO3H.

Provide an acceptable name for the compound below.

How many peaks are in the proton spin decoupled 13C NMR spectrum of p-dichlorobenzene?

Provide the structure of anisole.

Which of the following compound has the highest melting point?

In the UV-visible spectra of the following compounds, in which does λmax appear at the highest wavelength?

Provide an acceptable name for the compound below.

Provide an acceptable name for the compound below.

Provide a correct common name for the following compound.

Which of the following compounds has the most signals in the proton-decoupled ¹³C NMR spectrum?

In the ¹³C NMR, in what region of the spectrum does one typically observe carbons which are part of the aromatic ring?

Provide an acceptable name for PhSO₃H.

How many peaks are in the proton spin decoupled ¹³C NMR spectrum of p-dichlorobenzene?

In the UV-visible spectra of the following compounds, in which does λ_max appear at the highest wavelength?