Question

Give the structures of A, B and C (explanation are not required)

(i)  A (C₄H₈)  which adds on HBr in the presence and in the absence of peroxide to give same product, C₄H₉Br.

(ii)  B(C₄H₈) which when treated with H₂O / H₂SO₄ gives C₄H₁₀O which cannot be resolved into optical isomers.

(iii)  C(C₆H₁₂), an optically active hydrocarbon which on catalytic hydrogenation gives an optically inactive compound C₆H₁₄.

Answer 1

(i)  (C₄H₈ ) adds on HBr in the presence and in the absence of peroxide to give same product, C₄H₉Br, hence C₄H₈ must be symmetrical alkene.