It must be flat planar. First check if the compound is cyclic.

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They follow all the criteria and look the same to an outsider.

How to determine aromaticity. It must be a ring. The term aromaticity actually has nothing to do with smell. Check if the cyclic compound has resonance.

The molecule must have 4n 2 pi electrons. It must have in each atom of the ring a p orbital that s orthogonal to the plane of the ring. In other words no atom in the ring can be sp3 hybridized.

Aromatic and anti aromatic compounds are nearly the same. Aromatic molecules have the following characteristics. It must have a hückel number.

This lesson examines multiple compounds to determine if they are aromatic antiaromatic or nonaromatic based on huckel s rule and other criteria. They are conjugated all around the ring. The 4 key factors.

The molecule must be flat. Non aromatic compounds are like my sister. Use the huckel s rule.

The easiest way to put it is this. To be aromatic a molecule must meet the following four conditions. In the last post we introduced the concept of aromaticity a property of some unusually stable organic molecules such as benzene although some aromatic molecules are indeed fragrant hello vanillin.

Protonating the bottom nitrogen in the imidazole disrupts the aromaticity of the ring because that nitrogen lone pair is part of the pi system. The 3 step method to identify aromatic compounds 1. They simply root for a different team.

This is generally assumed to be true for most molecules. Aromatics root for huckel s rule so that n whole number anti aromatic root for the opposite team so that n fraction. If the oxygen is sp 3 hybridized the molecule will not have a continuous chain of unhybridized p orbitals and will not be considered aromatic it will be non aromatic.

Depending on what hybridization the oxygen atom chooses will determine whether the molecule is aromatic or not. Upon protonation the lone pair is tied up in a bond to hydrogen. To determine the strength of a base you look at the stability of the conjugate acid.

How to determine aromaticity.