Question

What are the necessary conditions for any compound to show aromaticity?

Answer 1

For aromaticity compound should follow following conditions.

1) It should be cyclic and planer.

2) it follow Hückel's rule. No of delocalised Pi electron should be (4n+2)

where n is a positive integer

for example benzene has 3 pi bonds means 6 pi electron

4n+2 =6

n = 1  means benzene is aromatic compound.

I hope it is clear now.

If you have any doubt , feel free to ask.

thanks  

Answer 2

Explanation:

1. The molecule should be planar.
2. the molecule should be cyclic with alternate single and double bond
3. The molecule should contain (4n+2)π electron where n= 0,1,2,3,etc.(huckel rule).
4. a molecule which does not satisfy any one or more of the above mentioned condition is said to be non aromatic.