Which of the following is correct regarding stability of conformations of n-butane about C_(2)-C bond Anti (I)gauche (II)partially eclipsed (III)fülly eclipsed (IV)

Which of the following is correct regarding stability of conformations

1.	Which of the following is correct regarding stability of conformations of n-butane about C_(2)-C bond Anti (I)gauche (II)partially eclipsed (III)fülly eclipsed (IV)
Answer» I gt II gt III gt IV I gt II gt IV gt III IV gt III gt II gt I IV gt II gt I gt III Solution :Dihedral angle is INVERSELY proportional to stability of conformer. Dihedral angles for fully eclipsed (IV), gauche (II) , partially eclipsed (III) and anti (I) are 0,60 , 120, 180 respectively