Conformations of Butane 女人因术女人因 Gauche Gauche Anti 60 60 2 Ant Dihedral ne between ■ anti conformation has two methyl groups 180away from each other ■ Rotation around the C2-C3 gives eclipsed conformation ■ Staggered conformation with methyl groups 60apart (causing steric strain)is gauche conformation Conformations of Butane „ anti conformation has two methyl groups 180° away from each other „ Rotation around the C2–C3 gives eclipsed conformation „ Staggered conformation with methyl groups 60° apart (causing steric strain) is gauche conformation