Diffraction data for compound 1 were collected on a Bruker APEX-II CCD diffractometer. The crystals were kept at a steady temperature of T = 100.4 K throughout data collection using an Oxford Cryosystems Cryostream. The dataset was truncated at 1 Å due to rapidly rising values of Rint at higher resolution. The structure was solved using ShelXT and refined with ShelXL interfaced through Olex2. [1-3] Diffraction data for compound 2 were collected on a Rigaku Oxford Diffraction Xcalibur diffractometer. The crystals were kept at a steady temperature of T = 120.0 K throughout data collection using an Oxford Cryosystems Cryostream.