Question

Draw the gas phase and solid phase structure of $H_2{O}_2$

Answer 1

The gas phase and solid structure of $H_2{O}_2$ is shown below








Hydrogen peroxide has a non-planar structure. Its molecular dimensions in the gas phase and solid phase are different.

(a) For $H_2{O}_2$ structure in gas phase, dihedral angle is ${111.5}^{\circ }$. The observed bond length for 𝑂−𝐻 and 𝑂−𝑂 bond found to be 95 pm and 147.5 pm respectively. Also, the angle between 𝑂−𝑂 and 𝑂−𝐻 bond was observed as ${94.8}^{\circ }$.

For $H_2{O}_2$ structure in solid phase at 110 K, dihedral angle is ${90.2}^{\circ }$ . The observed bond length for 𝑂−𝐻 and 𝑂−𝑂 bond found to be 98.8 pm and 145.8 pm respectively. Also, the angle between 𝑂−𝑂 and 𝑂−𝐻 bond was observed as ${101.9}^{\circ }$.