Fig. 7. Molecular structure of 6-Cu in the solid state as determined by X-ray crystallography. Thermal ellipsoids set at the 50% probability level. Hydrogen atoms omitted and Dipp groups shown in wireframe format for clarity. Key bond lengths (Å) and angles (°): Cu(1)–O(4): 2.062(3), C(48)–O(3): 1.874(3), C(48)–O(4): 1.268(6), C(48)–O(2): 1.296(6).
