State Huckel's rule.
Name three heterocyclic compounds which are aromatic in nature.
Will cyclo-octatetraene show aromatic character?
Cyclobutadiene is not aromatic. Explain.
what are annulenes? Give one example.
Which of the following exhibits aromaticity:(i) Cyclo - octatetraene (ii) Cyclopentadiene (iii) Tropylium cation?
Give two examples of ions which are non-aromatic. Why don't they exhibit aromaticity?
Is benzene same as 1, 3, 5-cyclohexatriene?
What is the role of catalyst in electrophilic substitution reactions?
Name the catalysts used in electrophilic aromatic substitution reactions.
Short Answer Type
-electrons i.e. does not obey Huckel rule. It is non-aromatic.
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