New Ruthenium(II) Complexes of Functionalized Monoanionic Aryldiamine N,C,N'‐Terdentate Ligands: Syntheses of [RuII{2,6‐(Me2NCH2)2‐4‐R‐C6H2}‐(terpy)]+Cl‐; X‐ray Structure of a Dimeric Organolithium Compound, [Li{2,6‐(Me2NCH2)2‐4‐Ph‐C6H2}]2

The new anionic functionalized aryldiamine ligands [2,6‐(Me2NCH2)2‐4‐R‐C6H2]‐ (R = Me3SiCC, C6H5, Me3‐Si), formally derived from [2,6‐(Me2‐NCH2)2C6H3]‐, have been prepared as their lithium compounds. The compound [Li{2,6‐(Me2NCH2)2‐4‐Ph‐C6H2}]2 crystallizes in the monoclinic space group C2/c (no. 15) with a = 13.1225(5), b = 13.5844(7), c = 18.9859(12) Å, β = 105.329(5)°, V = 3264.0(3) Å3. Z = 4. The structure refinement converged to R1 = 0.0374 for 2037 observed reflections [Fo>4σ(Fo)] and wR2 = 0.0922 for 2560 unique data. The organolithium compounds have been used in transmetalation reactions to give the corresponding functionalized organoruthenium(II) complexes [RuII{2,6‐(Me2NCH2)2‐4‐R‐C6H2}‐(terpy)]+Cl‐ (terpy = 2,2′;6′,2′‐terpyridine). The RuII species with R = HC°C has also been synthesized.