JEE Main · 2024 · 29 Jan 2024 · Shift 2 · General Organic Chemistry

According to IUPAC system, the compound is named as

(A)Cyclohex-1-en-2-ol
(B)1-Hydroxyhex-2-ene
(C)Cyclohex-1-en-3-ol
(D)Cyclohex-2-en-1-ol✓ Correct

Answer: (D)

Solution

The principal characteristic group,

- OH

, must receive the lowest possible locant, so numbering of the ring starts at the carbon bearing the hydroxyl group as C1.

Numbering around the ring in the direction that also gives the double bond the lowest locant places the double bond between C2 and C3, so the unsaturation is cited as "2-ene" and the hydroxyl as "1-ol".

The compound is named cyclohex-2-en-1-ol.

JEE Main · 2024 · 29 Jan 2024 · Shift 2 · Single correct option

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