How many open-chain (acyclic) structural isomers exist for a hydrocarbon with the molecular formula — Hydrocarbons Chemistry Question
Question
How many open-chain (acyclic) structural isomers exist for a hydrocarbon with the molecular formula $C_4H_6$?
Answer: A
💡 Solution & Explanation
$C_4H_6$ has a Degree of Unsaturation of 2. Acyclic isomers can be alkynes or alkadienes: but-1-yne, but-2-yne, buta-1,3-diene, and buta-1,2-diene. Total = 4.
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