Map A ORGANIC CHEMISTRY presented by sapling learning JANET L. MAXWELL Indicate

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Map A ORGANIC CHEMISTRY presented by sapling learning JANET L. MAXWELL Indicate whether or not each of the following structures is considered to be aromatic. O A is aromatic, B is not O B is aromatic, A is not O Both A and B are aromatic O A and B are not aromatic There is additional feedback available! View this feedback by clicking on the bottom divider bar. Click on the divider bar again to hide the additional feedback. Incorrect Close A Previous 2 Give Up & View solution Try Again Next Exit Explanation

Explanation / Answer

An aromatic compound contains a set of covalently-bound atoms with specific characteristics:

In the first compound the number of double bonds are 5x2 = 10

The number of rings in the compound are two ---> n = 2

So 4(2)+2 = 10 electrons.

So it obeys Hückel's Rule , so it is an aromatic compound.

Comming to the second one it has a total of 8x2 = 16 electrons.

The number of rings are 4 so 4(4)+2 = 18 electrons which cannot balance .So (4n+2) rule couidn't obeys.

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The IUPAC criteria for antiaromaticity are as follows

So the compound is antiaromatic.

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