What is the major type of attractive force for OBr2?

The major type of attractive force in OBr2 (oxygen dibromide) is dipole-dipole interactions. This molecule has polar covalent bonds due to the significant difference in electronegativity between oxygen and bromine, leading to a dipole moment. Additionally, there may also be London dispersion forces present, but dipole-dipole interactions are the predominant forces due to the molecule's polarity.