Evaluate the alkene 3-ethyl-2-pentene (). How many distinct hyperconjugative canonical structures (n — GOC and Organic Chemistry Basics Chemistry Question
Question
Evaluate the alkene 3-ethyl-2-pentene ($CH_3-CH=C(CH_2CH_3)_2$). How many distinct hyperconjugative canonical structures (no-bond resonance forms) can be theoretically drawn for this molecule?
Answer: B
💡 Solution & Explanation
The number of hyperconjugative structures equals the number of $\alpha$ -hydrogens. The double bond carbons are attached to one methyl group (3 $\alpha$ -H) and two ethyl groups (2 $\alpha$ -H each). Total $\alpha$ -hydrogens = 3 + 2 + 2 = 7. Thus, 7 no-bond forms can be drawn.
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