Isomer count: Determine the maximum number of isomers for the alkene C₄H₈. Consider positional and geometrical (cis–trans) isomerism where applicable. Choose the correct count.

Question

Isomer count: Determine the maximum number of isomers for the alkene C₄H₈.  Consider positional and geometrical (cis–trans) isomerism where applicable. Choose the correct count.

Accepted Answer

Approach Structural isomers: 1-butene, 2-butene, 2-methylpropene. 2-Butene exhibits geometric isomerism: cis-2-butene and trans-2-butene. Count 1-butene (1), cis-2-butene (2), trans-2-butene (3), 2-methylpropene (4) ⇒ total = 4. Final Answer 4.

Isomer count: Determine the maximum number of isomers for the alkene C₄H₈. Consider positional and geometrical (cis–trans) isomerism where applicable. Choose the correct count.

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