Which compound shows E/Z isomerism?
Answer and explanation
Correct answer: D. But-2-ene
- Step 1: E/Z isomerism needs restricted rotation about C=C and two different groups on each carbon of the double bond. Step 2. In but-2-ene each carbon has an H and a CH3. Answer: But-2-ene. Why not the others: but-1-ene has two hydrogens on one alkene carbon; 2-methylpropene has two methyl groups on one carbon; propene has two hydrogens on one carbon.
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