Fig. 5: Trapping of 3,5-dimethylbenzyl and ethylbenzyl anion, as evident by X-ray crystallography.

Solid state structure of 10 is represented with ellipsoids at 35% probability level. For clarity, the hydrogen atoms in the structure are omitted. Selected bong distances (Å) in 10: Na1―N1 2.455(1), Na1―N2 2.548(2), Na1―N3 2.544(1), Na1―N4 2.471(2), Na2―N6 2.424(1), Na2―N8 2.456(2), Na2―N9 2.432(2) Na1―C7 2.610(2), Na3―C7 2.677(2).