The lowest energy conformer of n-butane is | vedclass

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(A) The lowest energy conformer of $n$-butane is the anti-conformer. In this conformation,the two bulky methyl groups are at a dihedral angle of $180^

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(A) The lowest energy conformer of $n$-butane is the anti-conformer. In this conformation,the two bulky methyl groups are at a dihedral angle of $180^{\circ}$ to each other,which minimizes steric repulsion (van der Waals strain) between them. Other conformations like gauche,eclipsed,and fully eclipsed have higher potential energy due to increased steric or torsional strain.

The lowest energy conformer of $n$-butane is

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