A hydrocarbon A, adds one mole of hydrogen in presence of platinum catalyst to form n-hexane when A is oxidised vigorously with KMnO_4 , a single carboxylic acid containing three carbon atoms isolated . Give the structure of A and explain.

A hydrocarbon A, adds one mole of hydrogen in presence of platinum cat

1.	A hydrocarbon A, adds one mole of hydrogen in presence of platinum catalyst to form n-hexane when A is oxidised vigorously with KMnO_4 , a single carboxylic acid containing three carbon atoms isolated . Give the structure of A and explain.
Answer» SOLUTION :(i)SINCE the hydrocarbon A adds one mole of `H_2` in presence of Pt to form n-hexane, THEREFORE, A must be an hexene. (ii)Since A on vigorous oxidation with `KMnO_4` gives a single carboxylic acid containing three carbon atoms, therefore A must be a symmetrical hexene, i.e., hex-3-ene. `UNDERSET"Hex-3-ene (A)"(CH_3CH_2CH=CHCH_2CH_3) underset(KMnO_4)overset"[O]"to underset"Propionic acid"(2CH_3CH_2COOH)` Thus, the GIVEN hydrocarbon A is hex-3-ene.