The compound Q has the formula $\ce{C4H7Br}$ and contains a double bond. How many non-cyclic isomers exist for Q? Should include cis-trans and any other form of isomers as well.

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    $\begingroup$ Homework. Add a list with all those you have found to your question, then we give hints as to what is missing. $\endgroup$ – Karl Apr 8 at 10:45
  • $\begingroup$ I can count at least 12... $\endgroup$ – Zenix Apr 8 at 11:45
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    $\begingroup$ Also duplicate of this $\endgroup$ – Zenix Apr 8 at 11:47