Table of contents

18. Aromaticity

Huckel's Rule

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Multiple Choice

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

Cyclic molecule

Planar molecule

4n + 2 atoms in the ring

Fully conjugated ring

Verified step by step guidance

Understand Hückel's rules for aromaticity, which are criteria that a molecule must meet to be considered aromatic.

Hückel's rules state that a molecule must be cyclic, planar, and fully conjugated, meaning that it has a continuous overlap of p orbitals.

The molecule must also follow the 4n + 2 rule, where n is a non-negative integer, indicating the number of π electrons in the ring.

Review the options given: Cyclic molecule, Planar molecule, 4n + 2 atoms in the ring, and Fully conjugated ring.

Identify that the statement '4n + 2 atoms in the ring' is incorrect because Hückel's rule refers to π electrons, not atoms.

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