Question:
Compare the structures of $\mathrm{H}_{2} \mathrm{O}$ and $\mathrm{H}_{2} \mathrm{O}_{2}$.
Solution:
In gaseous phase, water molecule has a bent form with a bond angle of $104.5^{\circ}$. The O-H bond length is $95.7$ pm. The structure can be shown as:
Hydrogen peroxide has a non-planar structure both in gas and solid phase. The dihedral angle in gas and solid phase is $111.5^{\circ}$ and $90.2^{\circ}$ respectively.
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