For compound 3 a disorder model of the CF3 group resulted in no better refinement than the ordered model. A region of solvent was modelled as a disordered mix of diethyl ether and nitromethane, consistent with molecular shape inferred from peaks in a difference electron density map. The solvent molecules were refined using an isotropic model and geometric restraints based on average values obtained from a search of the Cambridge Structural Database. While the solvent can be masked using the solvent mask routine in Olex2 to give a cleaner pattern it was felt preferable to report the model which includes the solvent molecules.