# How many non-cyclic isomers exist for C4H7Br? [closed]

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.

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