An ab initio quasi-diabatic potential energy matrix for OH(²Σ) + H₂

A diabatic potential energy matrix for three electronic states of OH₃ has been constructed by interpolation of multi-reference configuration interaction electronic structure data. The reactive, exchange and non-reactive quenching dynamics are investigated using surface hopping classical trajectories. Classical trajectory simulations show good agreement with cross molecular beam data for the OH(²Σ) + D₂ → HOD + D reaction