Question

what is the difference between heterocyclic non-aromatic compounds and heterocyclic aromatic compounds?

Answer 1

Answer:

Properties of Aromatic compounds

(i) All carbon atoms must be Sp2 Hybridised.

(ii) They must be CYCLIC

(iii) Conjugated system with complete delocalisation of pi electrons with (4n+ 2) pi electrons.

If n= 0,1,2,3..... ; (4n+2) = 2,6,10,14.... - These are Hückel Numbers.

Point 3 basically means that the no. of pi electrons in the compound must be a HÜCKEL NUMBER.(2,6,10......)

Pyridine, Thiophene, Furan are examples of heterocyclic aromatic compounds. They follow the above mentioned 3 points.

Oxirane, oxetane etc are non aromatic heterocyclic as they don’t follow these points.

Refer attachment for structures of mentioned compounds!!!

Answer 2

Answer:

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