Which of the following is arranged inorderof increasing bond angle?

Options

A. `CI_(2)O lt OF_(2) lt Br_(2)O`
B. `Br_(2)O lt OF_(2) lt Cl_(2)`
C. `Br_(2)O lt Cl_(2) lt OF_(2)`
D. `OF_(2) lt Cl_(2)O lt Br_(2)O`

Answer

4

Explanation

Replusive between the lone pairs on `O` atom reduces the bond angle in `F_(2)O` form the tetrahedral angle of `109.5^(@)` to `103^(@)`. In both `CI_(2)O` and `Br_(2)O` the bond angle are increased (relative to tetrahedral angle )because of steric crowding of the bigger halogne atoms.