(a) BrO has been detected in the emission gases from volcanoes (N. Bobrowski et al. (2003) Nature, vol. 423). Construct an MO diagram for the formation of BrO from Br and O atoms. Comment on any properties and bonding features of BrO that you can deduce from the diagram.

(b) [Cl₂O₂]⁺ is approximately planar and is described as a charge transfer complex of [Cl₂]⁺ and O₂. By considering the HOMOs and LUMOs of [Cl₂]⁺ and O₂, suggest what orbital interactions are involved in the charge transfer.