Fig. 3: X-ray structures of 6b and 6c.

a Top view and b side view of 6b. c Top view and d side view of 6c. Solvent molecules and hydrogen atoms on carbon have been omitted for clarity.
a Top view and b side view of 6b. c Top view and d side view of 6c. Solvent molecules and hydrogen atoms on carbon have been omitted for clarity.