Conformational Stability of Ethane & Butane: Which is More Stable?

The video tutorial explains the stability of ethane and butane conformations. Staggered conformations are more stable than eclipsed ones due to less repulsion between bonds. The energy difference between these conformations is termed torsional energy, which is 12 kJ/mol for ethane. In butane, anti conformation is more stable than gauche due to steric strain. Fully eclipsed conformation is the least stable due to maximum steric strain. The video also discusses energy levels of different butane conformations and their graphical representation.

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