What are the characteristics and identifying properties for being a homoaromatic compound?

Properties of Aromatic Hydrocarbons include that their major sources are Petroleum and coal. They are well known for their exceptional physical and chemical properties. Poly-aromatic hydrocarbons are defined as aromatic compounds with more than one benzene. When they include in atmospheric pollution then it is known as carcinogenic in nature.

Aromatic compounds also include amino acids and precursors to nucleotides. Which are soluble in water they are known as non-polar hydrocarbons. These hydrocarbons cannot form ions or H-bonds with water molecules. They are usually unreactive because of extra stability and for many organic and inorganic reactions it is widely used as an inert solvent.

The ratio for carbon-hydrogen is high. They born with sooty yellow flame because of the presence of high carbon content.

They go through electrophilic substitution reactions and nucleophile aromatic substitution.

Hydrocarbons which have multiple bonds are unsaturated in nature like alkenes and alkynes. They tend to give addition reactions due to this unsaturation.

Due to resonance and give characteristic electrophilic substitution reactions aromatic hydrocarbons are stable. The carbon ring acts as a nucleophile in these reactions and to form a substituted product an electrophile attack on benzene.

With the coming electrophile, one of the H-atom of a ring is substituted because of this the product also holds its stability and aromatic in nature. On the opposite side in the addition reactions, aromatic compound may lose their aromaticity so they do not prefer to give such reactions.