Reaction of [cis- Ru(2,2'-bPY)(2)(O3SCF3)(2)] (1) with 9-methylguanine (9-MeG) affords the cis-[Ru(2,2'-bpy)(2)(9-MeG)(2)](2+) complex (2) in good yield. Two bases bind to the metal center via the N7 atoms. X-ray structure analysis of 2(SO3CF3)2 (monoclinic, P2(1)/n, a = 12.5159(6) Angstrom, b = 20.0904(13) Angstrom, c = 17.1202(9) Angstrom, beta = 98.981 (6)degrees, V = 4252.1(4) Angstrom(3), Z = 4) reveals that the two bases are in a head-to-tail (HT) orientation with base-base dihedral angle of 60.40degrees. NMR studies confirm that the complex is stable in water for hours, and no evidence for guanine substitution by solvent molecules was found.