Question

Hydrogen peroxide has a non-planar structure. In gas phase of $H _{2} O _{2}$, dihedral angle is $x^{\circ}$ and in solid phase at $110\, K ,$ its dihedral angle is $y^{\circ} .$ What are $x$ and $y$ ?

• A. $90^{\circ}, 90^{\circ}$
• B. $90.2^{\circ}, 101.5^{\circ}$
• C. $111.5^{\circ}, 90.2^{\circ}$
• D. $90.2^{\circ}, 119.5^{\circ}$

Answer 1

Answer: (C)

Structure of $H _{2} O _{2}$ is slightly different in gas phase and crystalline phase.