Tag: M.W:400-500

Electric Literature of 37366-09-9, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 37366-09-9, C12H12Cl4Ru2. A document type is Article, introducing its new discovery.

A straightforward route to chiral AgI and RuII complexes with phenanthrene-fused N-heterocyclic carbene (NHC) ligands is described. The chiral imidazole derivative 1 was prepared in high yield by a simple one-pot reaction starting from commercially available 9,10-phenanthrenequinone. Imidazolium salts 2 and 3 were obtained by alkylation of 1 with alkyl bromides and subsequent anion exchange with Amberlyst A21 resin. Deprotonation with KOtBu led to the corresponding free carbenes 4 and 5, which were isolated without dimerization. Stirring carbene 4 in acetonitrile resulted in CH insertion. AgI complexes were obtained by treatment of the imidazolium salts with Ag2O and showed an interesting low-temperature behavior in the 1H NMR spectrum. Transmetalation with a Ru precursor led to the corresponding RuII complexes. Chiral phenanthro-annulated imidazolium salts were prepared from 9,10-phenanthrenequinone and 1-phenylethylamine and converted to N-heterocyclic carbenes. AgI complexes were obtained by reaction of the imidazolium salts with Ag 2O and used for transmetalation with [RuCl2(C 6H6)]2. Both the AgI and the Ru II complexes showed restricted flexibility in solution. Copyright

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

Reference of 37366-09-9, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a patent, introducing its new discovery.

We present a C-H activation protocol for aromatic compounds that overcomes the current limitations of the need for a directing group or covalently bound activating groups, by exploiting the increase in C-H acidity of aromatic compounds on pi-coordination to a Ru(II) center. The increased acidity facilitates catalytic concerted metalation-deprotonation and subsequent arylation reactions. We present the development and optimization of the C-H activation protocol and show the applicability of the reaction to a range of aromatic substrates, including the simplest of substrates (benzene). Furthermore, we demonstrate the recyclability of the activating Ru(II) fragment using photolysis and give a mechanistic study, which provides strong evidence that this reaction occurs via a silver-mediated C-H bond activation. This is the first time Ru complexes have been shown to allow C-H activation of arenes by a pi-coordination mechanism.

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

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

Abstract: We have successfully prepared two ruthenium-based covalent bonding photosensitizer?catalyst dyads through a simple procedure. 1H NMR spectra of both dyads show that only a single stereoisomer was formed for each dyad. The spectroscopic and electrochemical properties and photocatalytic water oxidation activities of both dyads were investigated in detail. The results indicate that there is negligible electron communication between the photosensitizer and catalyst centers, and each component maintains the desired photophysical and electrochemical properties, which would diminish excited-state electron recombination by facilitating the intramolecular electron transfer. In the presence of excess sacrificial electron acceptor, the dyad with iodide ligand shows a 5.5-fold increase in catalytic performance as compared to its chloro analogue, indicating that the iodide ligand plays an important role during the catalytic cycle. Moreover, compared with the multi-component system, the dyad with iodide ligand exhibits a fourfold increase in catalytic turnover number. Graphical abstract: [Figure not available: see fulltext.].

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.HPLC of Formula: C20H16Cl2N4Ru. 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

In an article, published in an article, once mentioned the application of 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer,molecular formula is C12H12Cl4Ru2, is a conventional compound. this article was the specific content is as follows.Computed Properties of C12H12Cl4Ru2

The cationic chloro complexes [(arene)Ru(H2N?NH 2)Cl]+ (1: arene = C6H6; 2: arene = p-MeC6H4iPr; 3: arene = C6Me6) have been synthesised from the corresponding arene ruthenium dichloride dimers and enantiopure (R1R or S1S) trans-1,2-diaminocyclohexane (H2N?NH2) and isolated as the chloride salts. The compounds are all water-soluble and, in the case of the hexamethylbenzene derivative 3, the aqua complex formed upon hydrolysis [(C6Me 6)Ru(H2N?NH2)-OH2]2+ (4) could be isolated as the tetrafluoroborate salt. The molecular structures of 3 and 4 have been determined by single-crystal X-ray diffraction analyses of [(C6Me6)Ru(H2N?NH2)Cl]Cl and [(C6Me6)Ru(H2N?NH2)OH 2][BF4]2. Treatment of [Ru2(arene) 2Cl4] with the monotosylated trans-1,2-diaminocyclohexane derivative (TsHN?NH2) does not yield the expected cationic complexes, analogous to 1-3 but the neutral deprotonated complexes [(arene)Ru(TsN?NH2)Cl] (5: arene = C6H6; 6: arene = p-MeC6H4iPr; 7: arene = C6Me 6; 8: arene = C6H5COOMe). Hydrolysis of the chloro complex 7 in aqueous solution gave, upon precipitation of silver chloride, the corresponding monocationic aqua complex [(C6Me 6)Ru(TsHN?NH2)(OH2)]+ (9) which was isolated and characterised as its tetrafluoroborate salt. The enantio-pure complexes 1-9 have been employed as catalysts for the transfer hydrogenation of acetophenone in aqueous solution using sodium formate and water as a hydrogen source. The best results were obtained (60C) with 7, giving a catalytic turnover frequency of 43 h-1 and an enantiomeric excess of 93 %. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.

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

Synthetic Route of 15746-57-3, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 15746-57-3, C20H16Cl2N4Ru. A document type is Article, introducing its new discovery.

The Living Daylight: Ruthenium-based chromophores are employed as building blocks for a photo-active complex bearing a known water-oxidation catalytic system [(Terpy)2(MnIII-mu-(O2)-Mn IV)]. Its activation by visible light has been studied by EPR spectroscopy. Copyright

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

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), Formula: C20H16Cl2N4Ru.

Herein we report the design of two new titanium metal-organic frameworks (MOFs), Ti3-BPDC-Ir and Ti3-BPDC-Ru, by doping [Ir(ppy)2(dcbpy)]Cl or [Ru(bpy)2(dcbpy)]Cl2 (bpy = 2,2?-bipyridine, ppy = 2-phenylpyridine, dcbpy = 2,2?-bipyridine-5,5?-dicarboxylate) into the Ti3-BPDC framework (BPDC = biphenyl-4,4?-dicarboxylate). Hierarchical assembly of photosensitizing ligands and Ti3(OH)2 secondary building units (SBUs) facilitates multielectron transfer to drive photocatalytic hydrogen evolution (HER) under visible light with turnover numbers of 6632 and 786 for Ti3-BPDC-Ir and Ti3-BPDC-Ru, respectively. Photophysical and electrochemical studies establish the photocatalytic HER via reductive quenching of the excited photosensitizers followed by electron transfer from the reduced photosensitizers to Ti3(OH)2 SBUs and explain the catalytic difference between the two MOFs. Density functional theory calculations reveal key steps of HER via protonation of TiIII-OH to generate the TiIII species with a vacant coordination site followed by proton-coupled electron transfer to afford the key TiIV-H intermediate.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Formula: C20H16Cl2N4Ru. 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

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, Recommanded Product: Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

Two new complexes, [(bpy)2Ru(dpp)RhI(COD)](PF 6)3 and [(Me2bpy)2Ru(dpp)Rh I(COD)](PF6)2(BF4) (bpy = 2,2?-bipyridine, Me2bpy = 4,4?-dimethyl-2,2?- bipyridine, dpp = 2,3-bis(2-pyridyl)pyrazine, and COD = 1,5-cyclooctadiene), representing a new Ru(II),Rh(I) structural motif, have been prepared and characterized by mass spectrometry, 1H NMR spectroscopy, electrochemistry, electronic absorption spectroscopy, and emission spectroscopy. These two complexes represent a new type of supramolecular complex with a [(TL)2Ru(dpp)]2+ (TL = terminal ligand) light absorber (LA) coupled to a Rh(I) center and are models for Ru(II),Rh(I) intermediates in the photochemical reduction of water using dpp-bridged Ru(II),Rh(III) photocatalysts. Electrochemical study reveals overlapping reversible Ru II/III and irreversible RhI/II/III oxidations and a quasi-reversible dpp0/- reduction, demonstrating that the lowest unoccupied molecular orbital (LUMO) is dpp(pi*) based. The COD ligand is sterically bulky, displaying steric repulsions between hydrogen atoms on the alkene of COD and dpp about the square planar Rh(I) center. An interesting reactivity occurs in coordinating solvents such as CH3CN, where Rh(I) substitution leads to an equilibrium between the Ru(II),Rh(I) bimetallic and [(TL)2Ru(dpp)]2+ and [RhI(COD)(solvent) 2]+ monometallic species. The electronic absorption spectra of both complexes feature transitions at ca. 500 nm attributed to a Ru(dpi) ? dpp(pi*) metal-to-ligand charge transfer (MLCT) transition that is slightly red-shifted from the Ru synthon upon Rh(I) complexation. The methylation of TL on the Ru impacts the electrochemical and optical properties in a minor but predictable manner. The photophysical studies, by comparison with the model complex [{Ru(bpy)2}2(dpp)] (PF6)4 and related Rh(III) complex [(bpy) 2Ru(dpp)RhIIICl2(phen)](PF6) 3, reveal the expected absence of a Ru(dpi) ? Rh(dsigma*) 3MMCT state (metal-to-metal charge transfer) in the title complexes, which is present in Rh(III) systems. The absence of this 3MMCT state in Ru(II),Rh(I) complexes results in a longer lifetime and higher emission quantum yield for the Ru(dpi) ? dpp(pi*) 3MLCT state than [(bpy)2Ru(dpp)RhIIICl 2(phen)](PF6)3. Both complexes display photocatalytic hydrogen production activity in the presence of water and a sacrificial electron donor, with the [(bpy)2Ru(dpp)Rh I(COD)](PF6)3 possessing a higher catalytic activity than the methyl analogue. Both display low activities, hypothesized to occur due to steric crowding about the Rh(I) site.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.Recommanded Product: 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

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, Formula: C12H12Cl4Ru2.

The dinuclear dichloro complexes [(eta6-arene)2Ru2(mu-Cl)2Cl2] and [(eta5-C5Me5)2M2(mu-Cl)2Cl2] react with 2-(pyridine-2-yl)thiazole (pyTz) to afford the cationic complexes [(eta6-arene)Ru(pyTz)Cl]+ (arene = C6H6 1, p-iPrC6H4Me 2 or C6Me6 3) and [(eta5-C5Me5)M(pyTz)Cl]+ (M = Rh 4 or Ir 5), isolated as the chloride salts. The reaction of 2 and 3 with SnCl2 leads to the dinuclear heterometallic trichlorostannyl derivatives [(eta6-p-iPrC6H4Me)Ru(pyTz)(SnCl3)]+ (6) and [(eta6-C6Me6)Ru(pyTz)(SnCl3)]+ (7), respectively, also isolated as the chloride salts. The molecular structures of 4, 5 and 7 have been established by single-crystal X-ray structure analyses of the corresponding hexafluorophosphate salts. The in vitro anticancer activities of the metal complexes on human ovarian cancer cell lines A2780 and A2780cisR (cisplatin-resistant), as well as their interactions with plasmid DNA and the model protein ubiquitin, have been investigated.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Formula: C12H12Cl4Ru2. In my other articles, you can also check out more blogs about 37366-09-9

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

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, Safety of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

This article deals with the hitherto unexplored metal complexes of deprotonated 6,12-di(pyridin-2-yl)-5,11-dihydroindolo[3,2-b]carbazole (H2L). The synthesis and structural, optical, electrochemical characterization of dimeric [{RuIII(acac)2}2(mu-L.?)]ClO4 ([1]ClO4, S=1/2), [{RuII(bpy)2}2(mu-L.?)](ClO4)3 ([2](ClO4)3, S=1/2), [{RuII(pap)2}2(mu-L2?)](ClO4)2 ([4](ClO4)2, S=0), and monomeric [(bpy)2RuII(HL?)]ClO4 ([3]ClO4, S=0), [(pap)2RuII(HL?)]ClO4 ([5]ClO4, S=0) (acac=sigma-donating acetylacetonate, bpy=moderately pi-accepting 2,2?-bipyridine, pap=strongly pi-accepting 2-phenylazopyridine) are reported. The radical and dianionic states of deprotonated L in isolated dimeric 1+/23+ and 42+, respectively, could be attributed to the varying electronic features of the ancillary (acac, bpy, and pap) ligands, as was reflected in their redox potentials. Perturbation of the energy level of the deprotonated L or HL upon coordination with {Ru(acac)2}, {Ru(bpy)2}, or {Ru(pap)2} led to the smaller energy gap in the frontier molecular orbitals (FMO), resulting in bathochromically shifted NIR absorption bands (800?2000 nm) in the accessible redox states of the complexes, which varied to some extent as a function of the ancillary ligands. Spectroelectrochemical (UV/Vis/NIR, EPR) studies along with DFT/TD-DFT calculations revealed (i) involvement of deprotonated L or HL in the oxidation processes owing to its redox non-innocent potential and (ii) metal (RuIII/RuII) or bpy/pap dominated reduction processes in 1+ or 22+/3+/42+/5+, respectively.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.Safety 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

Electric Literature of 15746-57-3, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 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

SnO//2 electrodes in the form of thin, highly doped films on glass were exposed to aqueous RuCl//3 solutions and examined electrochemically and by x-ray photoelectron spectroscopy (XPES). For both native SnO//2 and SnO//2 silanized with an alkylamine silane, the Ru is strongly chemisorbed and yields a broad chemically reversible surface wave near 0V and an irreversible oxidation wave near plus 0. 85V. XPES sputtering experiments reveal the existence of subsurface Ru at depths similar to observed O/Sn nonstoichiometry.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 15746-57-3 is helpful to your research., Electric Literature of 15746-57-3

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