More Challenging Questions These questions require more thought and integrate several c...

More Challenging Questions

These questions require more thought and integrate several concepts.

When a molecule of cis-2-butene has rotated 90° around the axis through the two central carbon atoms, the π bond between these atoms is essentially broken. Use bond energies to estimate the activation energy for rotation around the π bond in ethylene, C₂H₄. Compare your result with the activation energy value in Figure 13.7.

Figure 13.7