JEE Advanced 2026 Chemistry question
Treatment of buta-1,3-diyne with (2 equivalents), followed by reaction with excess of trans-\mathrm{CH_3{-}CH{=}CH{-}CH_2{-}Br} gives X as the major product. The maximum number of carbon atoms that are collinear (in a straight line) in X is .
Answer: 6
Solution
The diacetylide is alkylated at both ends: X = \mathrm{CH_3CH{=}CHCH_2{-}C{\equiv}C{-}C{\equiv}C{-}CH_2CH{=}CHCH_3}. The four sp carbons and the two CHâ‚‚ carbons bonded to the
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