Skip to main content

My Courses

AI Tools Channels Home

18. Aromaticity

Huckel's Rule

18. Aromaticity

Huckel's Rule

Guided videos.

Learn with Johnny

Go to the course

Johnny Betancourt

Practice this topic

Multiple Choice

Which of the following is NOT one of Hückel's rules for aromaticity?

Multiple Choice

Is the following molecule aromatic?

Multiple Choice

Which of the following molecules is aromatic?

Multiple Choice

Which of the following is NOT an aromatic molecule?

Multiple Choice

Classify the following molecule as aromatic, antiaromatic, or nonaromatic.

Textbook Question

a. What is the value of n in Hückel's rule when a compound has nine pairs of p electrons? b. Is such a compound aromatic?

Textbook Question

(•) (i) Classify the following molecules as aromatic, nonaromatic, or antiaromatic. (ii) For aromatic molecules, solve for n in Hückel’s rule. For all other molecules, explain which rule of aromaticity is being broken.

(a) <IMAGE>

Textbook Question

(•) (i) Classify the following molecules as aromatic, nonaromatic, or antiaromatic. (ii) For aromatic molecules, solve for n in Hückel’s rule. For all other molecules, explain which rule of aromaticity is being broken.

(b) <IMAGE>

Textbook Question

(•) (i) Classify the following molecules as aromatic, nonaromatic, or antiaromatic. (ii) For aromatic molecules, solve for n in Hückel’s rule. For all other molecules, explain which rule of aromaticity is being broken.

(f) <IMAGE>

Textbook Question

(•) (i) Classify the following molecules as aromatic, nonaromatic, or antiaromatic. (ii) For aromatic molecules, solve for n in Hückel’s rule. For all other molecules, explain which rule of aromaticity is being broken.

(f) <IMAGE>

Textbook Question

(•) (i) Classify the following molecules as aromatic, nonaromatic, or antiaromatic. (ii) For aromatic molecules, solve for n in Hückel’s rule. For all other molecules, explain which rule of aromaticity is being broken.

(g) <IMAGE>

Textbook Question

(•) (i) Classify the following molecules as aromatic, nonaromatic, or antiaromatic. (ii) For aromatic molecules, solve for n in Hückel’s rule. For all other molecules, explain which rule of aromaticity is being broken.

(h) <IMAGE>

Textbook Question

The ribonucleosides that make up ribonucleic acid (RNA) are composed of d-ribose (a sugar) and four heterocyclic “bases.” The general structure of a ribonucleoside is shown here.

<IMAGE>

The four heterocyclic bases are cytosine, uracil, guanine, and adenine. Cytosine and uracil are called pyrimidine bases because their structures resemble pyrimidine. Guanine and adenine are called purine bases because their structures resemble purine.

<IMAGE>

(a) Determine which rings of these bases are aromatic.

Textbook Question

Classify the following conjugated systems as having 4n or 4n + 2 π electrons. (c)

Textbook Question

Classify the following conjugated systems as having 4n or 4n + 2 π electrons. (f)

Textbook Question

Which compound in each set is aromatic? Explain your choice.

a. <IMAGE>

Textbook Question

Which compound in each set is aromatic? Explain your choice.

b. <IMAGE>

Showing 17 of 17 practice