The Absolute Best Science Experiment for Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Recommanded Product: Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II). In my other articles, you can also check out more blogs about 15746-57-3

15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), molecular formula is C20H16Cl2N4Ru, belongs to ruthenium-catalysts compound, is a common compound. In a patnet, once mentioned the new application about 15746-57-3, HPLC of Formula: C20H16Cl2N4Ru

A series of complexes of the type <(bpy)2RuIIL-(Pro)n-CoIII(NH3)5>4+, n = 1-6, where L = 4-carboxy-4′-methyl-2,2′-bipyridine, bpy = 4,4′-bipyridine, and Pro = l-proline, have been synthesized from the corresponding <(bpy)2RuIIL> and <(NH3)5CoIII(Pro)n> components.The compounds were characterized by metal analyses, electrochemical measurements, and absorption spectroscopy.For n = 4-6 prolines, the CD spectra of the complexes show a polyproline II helical structure.Intramolecular electron transfer within these complexes was studied by generating the <(bpy)2uIIL.-(Pro)n-CoIII(NH3)5> intermediate by the reaction of eaq (generated by pulse radiolysis) with the <(bpy)2RuIIL-(Pro)n-CoIII(NH3)5> molecules.The driving force for this reaction is estimated to be ca. -1.1 V.The intramolecular electron transfer rates (k) and activation parameters (DeltaH<*> (kcal/mol, DeltaS<*> (eu) found for these studies were (1.6 +/- 0.1 x 107 s-1, 6.0 +/- 0.6, -6 +/- 2; (2.3 +/- 0.2) x 105 s-1, 9.2 +/- 0.4, -3 +/- 1; (5.1 +/- 0.4) x 104 s-1, 9.4 +/- 0.2, -5.5 +/- 0.8; (1.8 /- 0.1) x 104 s-1, 9.0 +/- 0.4, -9 +/- 1; and (8.9 +/- 0.6) x 103 s-1, 8.8 +/- 0.4, -11 +/- 1 for n = 2-6, respectively.For n = 1 proline, k is > 5 x 108 s-1 and no temperature dependence could be determined.The rate of intramolecular electron transfer decrease rapidly with distance for n = 1-3 prolines but show a surprisingly weak decrease with distance for the n = 4, 5, and 6 prolines, which exhibit the polyproline II helical structure.The electron-transfer pathways within these molecules and the relationship of the electron-transfer rates to the helical polyproline II structure are discussed.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Recommanded Product: Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II). In my other articles, you can also check out more blogs about 15746-57-3

Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI