Aromatic Hydrocarbons Practice Problems

Determine whether the ion given below is aromatic, antiaromatic, or nonaromatic. If the ion is aromatic/antiaromatic, calculate the n in the Hückel's/Breslow's rule. If it is nonaromatic, justify your answer using the rules of aromaticity.

Specify whether the ion below is aromatic, nonaromatic, or antiaromatic. If the ion is aromatic/antiaromatic, determine the value of n in Hückel's/Breslow's rule. If the ion is nonaromatic, explain your answer using the rules of aromaticity.

Using the rules of aromaticity, classify the given ion below as aromatic, antiaromatic, or nonaromatic. If classified as aromatic/antiaromatic, determine the value of n in Hückel's/Breslow's rule. If classified as nonaromatic, provide an explanation.

Is the anion below nonaromatic, antiaromatic, or aromatic? If it is aromatic, what is its n in Hückel's rule? If not, explain the aromaticity rule it breaks.

Determine if the cation below is aromatic, antiaromatic, or nonaromatic. If it is aromatic, determine its n in Hückel's rule. If not, explain how it breaks the aromaticity rule.

Is the given molecule antiaromatic, aromatic, or nonaromatic? If it is aromatic, what is its n in Hückel's rule? If not, why does it break the aromaticity rule?

What is the IUPAC name for the following given name: p-fluoro-o-iodophenol?

Explain why the ketal shown below does not undergo the mechanism of acid-catalyzed ketal hydrolysis. (Hint: Write the reaction mechanism like the reaction would occur and analyze the intermediates formed.)

Which resonance structure contributes more to the resonance hybrid of 7-(cyclohexa-2,5-dien-1-ylidene)cyclohepta-1,3,5-triene, A or B?

Which of these are aromatic structures?

Which of these are aromatic structures?

Draw the energy levels of the molecular orbitals for cyclopentadienyl cation, show the distribution of pi electrons, and determine whether it is aromatic or not.

Draw the energy levels of the molecular orbitals for cyclopentadienyl anion, show the distribution of pi electrons, and determine whether it is aromatic or not.

Identify each of the compounds shown below as nonaromatic, antiaromatic, or aromatic. Provide a brief explanation for your answer.

Identify each of the compounds shown below as nonaromatic, antiaromatic, or aromatic. Provide a brief explanation for your answer.

Which compounds are likely to be aromatic? Explain why they are aromatic.

In the given ion pair, determine which is more stable.

Identify the direction of the dipole moment in the structure shown below. Provide a brief explanation.