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Front view (a) and side view (b) of the X-ray crystal structure of (E-1)2
2 (major conformations of 1 and 2; see also Supporting Information File 1, Figures S15 and S16). The horizontal plane (pink) denotes the positions of eight equatorial imidazole groups; four axial imidazoles are denoted by black arrows. Color codes: C, gray; N, blue; Pd, orange. Hydrogens, counterions, and solvent molecules are not shown for clarity.
