GOC and Organic Chemistry BasicsmediumNUMERICAL

In a molecule of isobutylene (2-methylpropene), what is the total number of distinct no-bond resonanGOC and Organic Chemistry Basics Chemistry Question

Question

In a molecule of isobutylene (2-methylpropene), what is the total number of distinct no-bond resonance (hyperconjugative) structures that can be drawn?

Answer: 6

💡 Solution & Explanation

Isobutylene has the structure $(CH_3)_2C=CH_2$. It contains two methyl groups attached to the $sp^2$ carbon, giving $3 + 3 = 6$ $\alpha$ -hydrogens. Since each $\alpha$ -hydrogen can form one no-bond resonance structure, the total is exactly 6.

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