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Consider the following reaction : A H 2 HSO 2 ) aq ( HSO 2 4 Hydrolysis ) 2 ( is Electrolys ) 1 ( 4 + + ⎯ ⎯ ⎯ ⎯ ⎯ → ⎯ + − − The dihedral angle in product A in its solid phase at 110 K is :

1. 104°
2. 111.5°
3. 90.2°
4. 111.0°

Correct answer: 90.2°

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