Aromatic Hydrocarbons Practice Problems

Determine whether the molecule given below is aromatic, antiaromatic, or nonaromatic. If the molecule is aromatic/antiaromatic, calculate the n in the Hückel’s/Breslow’s rule. If the molecule 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.