Figure 3.

Crystal structure of compound 7 projected along the a axis, at 100 K. Hydrogen atoms and disordered parts of lower occupancies are omitted for clarity. Compound 7 crystallizes in a sandwich‐herringbone packing wherein the herringbone is made up of sandwich‐like diads with both edge‐to‐face and offset face‐to‐face interactions of π‐stacked molecules that have an interplanar distance of 3.41–3.47 Å. Atomic displacement ellipsoids are shown at the 50 % probability level. Element color: carbon (white), nitrogen (blue), oxygen (red).