Which of the following molecules does not show stereo isomerism?
Show Hint
- 3, 4-Dimethylhex-3-ene
- 3-Methylhex-1-ene
- 3-Ethylhex-3-ene
- 4-Methylhex-1-ene
The Correct Option is C
Solution and Explanation
(2) 3-Methylhex-1-ene: C3 is attached to H, CH3, vinyl and propyl, so it is chiral (optical isomerism).
(3) 3-Ethylhex-3-ene: \(\mathrm{CH_3CH_2{-}C(C_2H_5){=}CH{-}CH_2CH_3}\). C3 carries two identical ethyl groups, so no geometric isomerism, and there is no chiral carbon: no stereoisomerism.
(4) 4-Methylhex-1-ene: C4 bears H, CH3, ethyl and allyl, so it is chiral.
Answer: (3) 3-Ethylhex-3-ene
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