Figure 2.
X-ray diffraction crystal structure of 5 and core-atom structures of 5′, 6, and 8 with thermal ellipsoids drawn at 50% probability. Hydrogen atoms (excepting the N–H′s), the BArF24 counteranion of 5, the triflate counteranion of 6, and cocrystallized solvent molecules have been removed for clarity. Refer to the Supporting Information for complete crystallographic details.