See image — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

# Structure of trans-2-Hexenal **Hexenal structure analysis:** - Hexenal has 6 carbons with an aldehyde group ($-CHO$) and one C=C double bond - "2-hexenal" means the double bond is between C2 and C3 - "trans" means the substituents on the double bond have opposite stereochemistry **Building the structure:** 1. **Aldehyde group at C1:** $CHO$ is terminal 2. **Double bond position:** Between C2 and C3 3. **Carbon chain:** $C_1(CHO) - C_2=C_3 - C_4 - C_5 - C_6$ 4. **trans configuration:** The hydrogen and alkyl groups attached to the double bond carbons must be on opposite sides **Evaluating options:** - **(A):** Shows double bond at wrong position (C3-C4) - **(B):** Wrong structure—shows saturated chain with aldehyde - **(C):** Double bond in wrong position; doesn't show trans properly - **(D):** ✓ Shows C1=C2 double bond with $CHO$ at position 1, followed by a saturated 4-carbon chain, with proper **trans geometry** (H and alkyl groups on opposite sides of the double bond) **Answer: (D)** correctly depicts trans-2-hexenal with the double bond between C2-C3, aldehyde at C1, and trans stereochemistry.