Ruthenium(II) Complexes with Three Different Diimine Ligands

Abstract The synthesis of tri‐heteroleptic complex of Ru(II) with diimine ligands is describe. Ten compounds [Ru(R 2 bpy) (biq) (L)][PF 6 ] 2 (R = H, CH 3 ); L = 2,2′‐bipyridine (bpy), 4,4′‐dimethyl‐2,2′‐bipyridine (Me 2 bpy), 2,2′‐bipyrimidine (bpm), 2,2′‐biisoquinoline (biiq), 1,10‐phenanthroline (phen), dipyrido[3,2‐ c :2′,3′‐ e ]pyridazine (taphen), 2,2′‐biquinoline (biq), 6,7‐dihydrodipyrido[2,3‐ b :3,2‐ j ][1,10]‐phenanthroline (dinapy), 2‐(2[pyridyl)quinoline (pq), 1‐(2‐pyrimidyl)pyrazole] (pzpm), 2,2′‐biimidazole (H 2 biim) are characterized by elemental analysis, electronic and 1 H‐NMR spectroscopy. The relative photosustitution rates of biq in MeCN are given at three temperatures.