JEE Main · 2024 · 31 Jan 2024 · Shift 2 · General Organic Chemistry

Identify structure of 2,3-dibromo-1-phenylpentane.

(A)(see structure)
(B)(see structure)
(C)(see structure)
✓ Correct
(D)(see structure)

Answer: (C)

Solution

Number the pentane chain from the carbon bearing the phenyl group, since substituents must get the lowest possible locants: C1 carries the phenyl group, C2 and C3 each carry a bromine, and C4–C5 complete the chain as

- C H_{2} - C H_{3}

.

The structure is

C_{6} H_{5} - C H_{2} - CHBr - CHBr - C H_{2} - C H_{3}

, i.e., 2,3-dibromo-1-phenylpentane.

JEE Main · 2024 · 31 Jan 2024 · Shift 2 · Single correct option

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