Question

why tetrahydrofuran is homocyclic and furan is heterocyclic​

Answer 1

Tetrahydrofuran is a cyclic compound with one heteroatom; oxygen (atom other than carbon). Therefore, it is alicyclic heterocyclic compound. Furan on the other hand is a five membered ring with two double bonds and non- bonding pairs of electrons on oxygen atom. ... Thus, furan is aromatic heterocyclic compound.

Answer 2

Explanation:

Tetrahydrofuran has no alternative double bonds in its structure so it is a heterocylic non aromatic alicylic (aliphatic cyclic).

Whereas, Furan Has alternative double bonds in its structure, making it heterocyclic aromatic compound.