New ruthenium(II) complexes of functionalized monoanioc aryldiamine N,C,N'-terdendtate 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-Pd-C6H2}]2