Fig. 1: Investigation on Li/Na Metal exchange.

a Synthesis of 2 and 3. b Solid state structures of 2 and 3 represented with ellipsoids at 35% probability level. For clarity, the hydrogen atoms in the structures are omitted. Selected bong distances (Å) in 2: Na1―N1 2.394(3), Na1―N2 2.387(4), Na1―N3 2.451(3) Na1―C27 2.601(4); Selected distances (Å) in 3: Na1―N1 2.475(2), Na1―N2 2.406(2), Na2―N1 2.459(2), Na2―N2 2.433(2), Na1―C34 2.702(2), Na2―C13 2.692(2).