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

The new anionic functionalized aryldiamine ligands [2,6‐(Me 2 NCH 2 ) 2 ‐4‐R‐C 6 H 2 ] ‐ (R = Me 3 SiCC, C 6 H 5 , Me 3 ‐Si), formally derived from [2,6‐(Me 2 ‐NCH 2 ) 2 C 6 H 3 ] ‐ , have been prepared as their lithium compounds. The compound [Li{2,6‐(Me 2 NCH 2 ) 2 ‐4‐Ph‐C 6 H 2 }] 2 crystallizes in the monoclinic space group C 2/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) Å 3 . Z = 4. The structure refinement converged to R 1 = 0.0374 for 2037 observed reflections [ F o >4σ( F o )] and wR 2 = 0.0922 for 2560 unique data. The organolithium compounds have been used in transmetalation reactions to give the corresponding functionalized organoruthenium(II) complexes [Ru II {2,6‐(Me 2 NCH 2 ) 2 ‐4‐R‐C 6 H 2 }‐(terpy)] + Cl ‐ (terpy = 2,2′;6′,2′‐terpyridine). The Ru II species with R = HC°C has also been synthesized.