What is dihedral angle in describing the structure of H_(2)O_(2) ? How it changes with a change in physical state ?

What is dihedral angle in describing the structure of H_(2)O_(2) ? How

1.	What is dihedral angle in describing the structure of H_(2)O_(2) ? How it changes with a change in physical state ?
Answer» Solution :Dihedral angle is the angle between TWO pages of the open BOOK structure of hydrogen peroxide. The dihedral angle in gas phase of hydrogen peroxide is `11^(0)30.` and in solid STATE is `90^(0)15.`. This decrease in the dihedral angle is ATTRIBUTED to hydrogen bonding.