Question

multiple choice 2 points the energy barrier for carbon - carbon bond rotation in propane is mainly due to ________. steric strain torsion strain bond strain angle strain

Explanation:

In propane, the energy barrier for carbon - carbon bond rotation is mainly due to torsion strain. Torsion strain occurs when eclipsed conformations are adopted during bond rotation, and there is repulsion between electrons in the bonds. Steric strain is more about non - bonding interactions between bulky groups, bond strain is related to stretching or compressing of bonds, and angle strain is about deviation from ideal bond angles. In the case of propane bond rotation, torsion strain is the dominant factor.

Answer:

B. torsion strain