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Question
Draw the structure of isomers of butene and write their IUPAC names.
Solution
Isomers in double bond compounds are possible with 4 or more than 4 carbon atoms. For example, butene has 4 carbon atoms, and it forms three isomers.
| Sr. No. | Structure | IUPAC name |
| 1. | CH3 - CH2 - CH = CH2 | But-1-ene |
| 2. | CH3CH = CH - CH3 | But-2-ene |
| 3. | CH2 = C(CH3) − CH3 | 2-methyl propene |
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