Fig. 3: X-ray crystal structures of 6 and 7.

a Top view of 6, b side view of 6, c top view of 7, d side view of 7. Ellipsoids are drawn at the 30% probability level. All hydrogen atoms except those connected to N and O atoms are omitted for clarity. Carbon atom, black ellipsoid; nitrogen atom, blue; palladium atom, orange; oxygen atom, red; hydrogen atom small black ball (These instructions are omitted in the following figures for clarity).