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Hydrocarbons

Long Answer Type

211.

What are the characteristics of a compound to be aromatic?
Or
What do you mean by aromaticity?
Or
What are the necessary conditions for any system to be aromatic?

231 Views

212.

Write a short note on annulenes.

184 Views

Short Answer Type

213.
Explain why the following systems are not aromatic?

Since the above structure contains sp³ hybridised carbon, therefore the system is not planar. Though it can six

electrons yet the system is not fully conjugated. In other words, all the six

-electrons do not form a single cyclic electron cloud which surrounds all the atoms of the ring. Hence it is not an aromatic compound.

The system is not planar due to the presence of sp³ hybridised carbon. Also,it contains four electrons, indicating that the system is not aromatic i.e. the system does not obey (4n + 2)n-electrons.