The bond angle in Cl₂O is expected to be approximately A) 90^$\circ$. B) 109.5^$\circ$. C) 120^$\circ$. D) 145^$\circ$. E) 180^$\circ$.

Question

Quizplus · Accepted Answer

The molecule Cl₂O has five atoms bonded to the central boron atom, giving it a trigonal bipyramidal geometry. The three atoms in the equatorial plane are bonded at 120° angles (option C) and the two axial atoms are bonded at 180° angles. The bond angle between the axial and equatorial atoms is approximately 90° (option A). However, this angle is slightly distorted due to the lone pair on the equatorial Cl atom, which repels the other atoms and reduces the bond angle. Therefore, the expected bond angle in Cl₂O is closer to 109.5° (option B), which is the ideal bond angle for a trigonal bipyramidal geometry with one equatorial lone pair. Option D and E are unlikely choices as they are far from the expected bond angle based on the molecule's geometry.

The Bond Angle in Cl2O Is Expected to Be Approximately ∘\circ∘

The Bond Angle in Cl₂O Is Expected to Be Approximately $\circ$