Ruthenium(II) complexes containing benzimidazolic tripodal ligands

Complexes [Ru(N,N,N-tris(benzimidazole-2-yl-methyl) a mine-kappa N, N', N''') Cl(PPh3)]Cl (1), [Ru(N, N-bis(benzimidazole-2-yl-methyl) hydroxyethylamine-kappa N, N', N''') Cl(PPh3)]Cl (2) and [Ru(N, N, N-tris(2-aminoethyl) amine-kappa N, N', N''') Cl(PPh3)]Cl (3) were synthesized by reaction of [Ru(PPh3)(3)Cl-2] with N, N, N-tris(benzim idazole-2-yl-methyl) amine (L-1), N, N-bis(benzimidazole-2-yl-methyl) hydroxyethylamine (L-2) and N, N, N-tris(2-aminoethyl) amine (L-3), respectively. The water soluble complex [Ru(N, N, N-tris(benzimidazole- 2-yl-methyl) amine-kappa N, N', N''')Cl(PTA)] Cl (4) was obtained by reaction of 1 with PTA (1,3,5-triaza7-phosphinoadamantane). Complexes were characterized by IR, NMR and elemental analysis. The structure of 1 was determined by single crystal X-ray diffraction analysis. Photo-and electro-chemical behaviours evolution of the complexes were also done. The structural and electronic properties of 1, 2 and 3 were studied by DFT and DFT-TDDFT. (C) 2015 Elsevier B.V. All rights reserved.