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Chapter 17: Q.20. (page 641)

Question: Use the inscribed polygon method to show why the following cation is aromatic.

Short Answer

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Answer

Step by step solution

01

Cyclopropenyl cation

Cyclopropenyl cation consists of two 蟺electrons and is planar. So, it obeys Huckel鈥檚 rule of aromaticity for 4n+2蟺electrons, where n=0.

02

Inscribed polygon method

The inscribed polygon method can be used to find whether a compound is aromatic or not.

03

To show why cyclopropenyl cation is aromatic

In using the inscribed polygon method, always draw the vertex pointing downward.

2蟺electrons are present, and all the bonding molecular orbitals are filled. So, it is aromatic.

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