A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), molecular formula is C20H16Cl2N4Ru. In a Article，once mentioned of 15746-57-3, Application In Synthesis of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)
A comparative photophysical study has been carried out on the complexes (bpy)2Ru(MQ+)2/4+ and (bpy)2Ru(bpy-py-Me+)3+ (1 and 2, respectively, where bpy= 2,2′-bipyridine, MQ+ is N-methyl-4,4′-bipyridinium and bpy-py-Me+ is 4-(N-methyl-4-pyridyl)-2,2′-bipyridine). In addition, the X-ray crystal structure of 2 is reported. As noted previously by Meyer and co-workers, complex 1 features strong photoluminescence from the Ru ? bpy metal-to-ligand charge transfer (MLCT) state at 80 K in an ethanol-methanol glass, but the emission is quenched at the solvent glass-to-fluid transition temperature due to intramolecular ligand-to-ligand charge transfer to produce the Ru ? MQ+ MLCT state: [(bpy)(bpy-·)Ru(III)(MQ+)2](4+*) ? (bpy)2Ru(III)(MQ·)(MQ+)](4+*). The existence of the Ru ? MQ+ MLCT state is confirmed in the present study by laser flash photolysis of 1 at 160 K which provides evidence for the reduced monoquat ligand, MQ·. The photophysics of the new complex 2 at temperatures ranging from 80 to 300 K is dominated by a the low-lying Ru ? bpy-py-Me+ MLCT state. Luminescence is observed from this state in an ethanol-methanol glass at 80 K as well as at temperatures above the solvent glass-to-fluid transition. The photoluminescence of 2 undergoes a large thermally-induced Stokes shift as the temperature is raised through the solvent glass-to-fluid transition region. The large Stokes shift is ascribed to solvent relaxation as well as relaxation with respect to a low-frequency inner sphere mode that consists of rotation around the C-C bond between the bpy and N-methylpyridinium rings in the bpy-py-Me+ acceptor ligand. Temperature dependent emission lifetime studies indicate that 2 features a dynamic anti-Stokes shift in the emission at T ? 110 K and a dynamic Stokes shift for T > 110 K. (C) 2000 Elsevier Science S.A.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.Application In Synthesis of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 15746-57-3, in my other articles.
Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI