Category: ruthenium-catalysts

Electric Literature of 10049-08-8. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 10049-08-8, Name is Ruthenium(III) chloride

Microwave synthesis of polymer-embedded Pt-Ru catalyst for direct methanol fuel cell

Platinum-ruthenium nanoparticles stabilized within a conductive polymer matrix are prepared using microwave heating. Polypyrrole di(2-ethylhexyl) sulfosuccinate, or PPyDEHS, has been chosen for its known electrical conductivity, thermal stability, and solubility in polar organic solvents. A scalable and quick two-step process is proposed to fabricate alloyed nanoparticles dispersed in PPyDEHS. First a mixture of PPyDEHS and metallic precursors is heated in a microwave under reflux conditions. Then the nanoparticles are extracted by centrifugation. Physical characterization by TEM shows that crystalline and monodisperse alloyed nanoparticles with an average size of 2.8 nm are obtained. Diffraction data show that crystallite size is around 2.0 nm. Methanol electro-oxidation data allow us to propose these novel materials as potential candidates for direct methanol fuel cells (DMFC) application. The observed decrease in sulfur content in the polymer upon incorporation of PtRu nanoparticles may have adversely affected the measured catalytic activity by decreasing the conductivity of PPyDEHS. Higher concentration of polymer leads to lower catalyst activity. Design and synthesis of novel conductive polymers is needed at this point to enhance the catalytic properties of these hybrid materials.

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

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Article£¬once mentioned of 37366-09-9, Safety of Dichloro(benzene)ruthenium(II) dimer

Mono and dinuclear complexes of half-sandwich platinum group metals (Ru, Rh and Ir) bearing a flexible pyridyl-thiazole multidentate donor ligand

The mononuclear cationic complexes [(eta6-C6H6)RuCl(L)]+ (1), [(eta6-p-iPrC6H4Me)RuCl(L)]+ (2), [(eta5-C5H5)Ru(PPh3)(L)]+ (3), [(eta5-C5Me5)Ru(PPh3)(L)]+ (4), [(eta5-C5Me5)RhCl(L)]+ (5), [(eta5-C5Me5)IrCl(L)]+ (6) as well as the dinuclear dicationic complexes [{(eta6-C6H6)RuCl}2(L)]2+ (7), [{(eta6-p-iPrC6H4Me)RuCl}2(L)]2+ (8), [{(eta5-C5H5)Ru(PPh3)}2(L)]2+ (9), [{(eta5-C5Me5)Ru(PPh3)}2(L)]2+ (10), [{(eta5-C5Me5)RhCl}2(L)]2+ (11) and [{(eta5-C5Me5)IrCl}2(L)]2+ (12) have been synthesized from 4,4?-bis(2-pyridyl-4-thiazole) (L) and the corresponding complexes [(eta6-C6H6)Ru(mu-Cl)Cl]2, [(eta6-p-iPrC6H4Me)Ru(mu-Cl)Cl]2, [(eta5-C5H5)Ru(PPh3)2Cl)], [(eta5-C5Me5)Ru(PPh3)2Cl], [(eta5-C5Me5)Rh(mu-Cl)Cl]2 and [(eta5-C5Me5)Ir(mu-Cl)Cl]2, respectively. All complexes were isolated as hexafluorophosphate salts and characterized by IR, NMR, mass spectrometry and UV-vis spectroscopy. The X-ray crystal structure analyses of [3]PF6, [5]PF6, [8](PF6)2 and [12](PF6)2 reveal a typical piano-stool geometry around the metal centers with a five-membered metallo-cycle in which 4,4?-bis(2-pyridyl-4-thiazole) acts as a N,N?-chelating ligand.

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

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.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, category: ruthenium-catalysts

Effects of electronic mixing in ruthenium(II) Complexes with two equivalent acceptor ligands. Spectroscopic, electrochemical, and computational studies

The lowest energy metal to ligand charge transfer (MLCT) absorption bands found in ambient solutions of [Ru(NH3)4(Y-py) 2]2+ and [Ru(L)2(bpy)2]+ complexes (Y-py a pyridine ligand and (L)n a substituted acetonylacetonate, halide, am(m)ine, etc.) consist of two partly resolved absorption envelopes, MLCTlo and MLCThi. The lower energy absorption envelope, MLCTlo, in these spectra has the larger amplitude for the bis-(Y-py) complexes, but the smaller amplitude for the bis-bpy the complexes. Time-dependent density functional theory (TD-DFT) approaches have been used to model 14 bis-bpy, three bis-(Y-py), and three mono-bpy complexes. The modeling indicates that the lowest unoccupied molecular orbital (LUMO) of each bis-(Y-py) complex corresponds to the antisymmetric combination of individual Y-py acceptor orbitals and that the transition involving the highest occupied molecular orbital (HOMO) and LUMO (HOMO?LUMO) is the dominant contribution to MLCTlo in this class of complexes. The LUMO of each bis-bpy complex that contains a C2 symmetry axis also corresponds largely to the antisymmetric combination of individual ligand acceptor orbitals, while the LUMOs are more complex when there is no C2 axis; furthermore, the energy difference between the HOMO?LUMO and HOMO?LUMO+1 transitions is too small (<1000 cm -1) to resolve in the spectra of the bis-bpy complexes in ambient solutions. Relatively weak MLCTlo absorption contributions are found for all of the [Ru(L)2(bpy)2]m+ complexes examined, but they are experimentally best defined in the spectra of the (L)2 = X-acac complexes. TD-DFT modeling of the HOMO?LUMO transition of [Ru(L)4bpy]m+ complexes indicates that it is too weak to be detected and occurs at significantly lower energy (about 3000-5000 cm-1) than the observed MLCT absorptions. Since the chemical properties of MLCT excited states are generally correlated with the HOMO and/or LUMO properties of the complexes, such very weak HOMO?LUMO transitions can complicate the use of spectroscopic information in their assessment. As an example, it is observed that the correlation lines between the absorption energy maxima and the differences in ground state oxidation and reduction potentials (DeltaE1/2) have much smaller slopes for the bis-bpy than the mono-bpy complexes. However, the observed MLCTlo and the calculated HOMO?LUMO transitions of bis-bpy complexes correlate very similarly with DeltaE1/2 and this indicates that it is the low energy and small amplitude component of the lowest energy MLCT absorption band that is most appropriately correlated with excited state chemistry, not the absorption maximum as is often assumed. Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.category: ruthenium-catalysts, you can also check out more blogs about15746-57-3

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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 301224-40-8, Name is (1,3-Dimesitylimidazolidin-2-ylidene)(2-isopropoxybenzylidene)ruthenium(VI) chloride,molecular formula is C31H38Cl2N2ORu, is a conventional compound. this article was the specific content is as follows.HPLC of Formula: C31H38Cl2N2ORu

Asymmetric synthesis of (+)-polyanthellin A

(Chemical Equation Presented) A concise and convergent route to (+)-polyanthellin A is presented. This synthesis features a diastereoselective cyclopropane/aldehyde [3+2] cycloaddition to install the hydroisobenzofuran core. The use of MADNTf2 as a potent, bulky Lewis acid was essential to allow a labile beta-silyloxy aldehyde to be used in the cycloaddition. Other key steps include a ring-closing metathesis and a selective olefin oxidation.

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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. 301224-40-8, Name is (1,3-Dimesitylimidazolidin-2-ylidene)(2-isopropoxybenzylidene)ruthenium(VI) chloride, molecular formula is C31H38Cl2N2ORu. In a Article£¬once mentioned of 301224-40-8, Application In Synthesis of (1,3-Dimesitylimidazolidin-2-ylidene)(2-isopropoxybenzylidene)ruthenium(VI) chloride

Synthetic studies on Stemona alkaloids. Construction of the sessilifoliamides B and C and 1,12-secostenine skeleton

An original synthetic approach to the Stemona alkaloids stenine and sessilifoliamides B and C has been explored. The strategy relies on the early construction of the pyrroloazepine core (rings A and B) and latter addition of the furanone (ring D) and ethyl chain at C-10, which are the common structural features of the three alkaloids. The formation of the azabicyclic nucleus through an intramolecular Morita-Baylis-Hillman reaction of a properly substituted pyrrolidone has been extensively investigated by modifications on the substrate and all the parameters involved in the process and an efficient protocol in terms of yield and stereoselectivity has been developed. Despite many alternative tactics were explored, insurmountable difficulties found in the last synthetic steps have frustrated the completion of the syntheses. However, along the way, a plethora of new compounds was prepared, some of them containing the full skeleton of the targeted alkaloids, which can be useful for future synthetic applications.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Application In Synthesis of (1,3-Dimesitylimidazolidin-2-ylidene)(2-isopropoxybenzylidene)ruthenium(VI) chloride. In my other articles, you can also check out more blogs about 301224-40-8

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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, Product Details of 37366-09-9.

B-substituted (arene)ruthenacarborane-sulfonium, -thioether and -mercaptan complexes: Mild single and double dealkylation and structural implications in the antipodal distance

Reactions of [RuCl2(eta6-arene)]2 (arene = benzene, p-cymene) with nido-[7-R-10-L-7,8-C2B9H 9]- in THF at room temperature for 3 d give the (arene)ruthenacarborane complexes closo-[3-Ru(eta6-arene)-1-R-8-L- 1,2-C2B9H9]+ {arene = benzene, R = H [L = Me2S (1a), THT (1b), EtPhS (1c)], R = Me [L = Me2S (2a)]; arene = p-cymene, R = H [L = Me2S (3a)]} and mercaptan closo-[3-Ru(eta6-arene)-1-R-8-HS-1,2-C2B 9H9] [arene = benzene, R = H (4), Me (5); arene = p-cymene, R = H (6)] in yields of 20-40% and 22-29%, respectively. The asymmetric ligand nido-[9-Me2S-7,8-C2B9H 10]- leads to the thioether complex closo-[3- Ru(eta6-benzene)-7-MeS-l,2-C2B9H 10] (8) in 34 % yield under the same reaction conditions. The crystal structure of 1a is described and compared with those of 4 and 8. The fully assigned 11B NMR spectroscopic data for a whole series of ruthenacarboranes having B-substituted sulfonium, thioether and mercaptan groups are presented. These data show a relation between antipodal cluster atom distances (antipodal distance) and antipodal effect (AE) in the crystal structures of these complexes and for other families of heteroboranes such as closo-[EB11H11] and closo-[EB9H9]. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.

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

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

Related Products of 301224-40-8, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 301224-40-8, Name is (1,3-Dimesitylimidazolidin-2-ylidene)(2-isopropoxybenzylidene)ruthenium(VI) chloride, molecular formula is C31H38Cl2N2ORu. In a Article£¬once mentioned of 301224-40-8

Ruthenium olefin metathesis catalysts bearing an N-fluorophenyl-N-mesityl- substituted unsymmetrical N-heterocyclic carbene

Two new ruthenium-based olefin metathesis catalysts, each bearing an unsymmetrical N-heterocyclic carbene ligand, have been synthesized and fully characterized. Their catalytic performance has been evaluated in ring-closing metathesis, cross metathesis, and ring-opening metathesis polymerization reactions.

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

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a Article£¬once mentioned of 10049-08-8, category: ruthenium-catalysts

Air-stable P-chiral bidentate phosphine ligand with (1-adamantyl) methylphosphino group

Air-stable diphosphine ligand, (R,R)-2,3-bis((1-adamantyl)-methylphosphino) quinoxaline, was prepared by the reaction of enantiomerically pure (S)-(1-adamantyl)methylphosphine-borane with 2,3-dichloroquinoxaline. The ligand exhibited excellent enantioselectivities in Rh-catalyzed asymmetric hydrogenation and Pd-catalyzed asymmetric ring-opening reaction. Copyright

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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, category: ruthenium-catalysts

Influence of methionine?ruthenium complex on the fibril formation of human islet amyloid polypeptide

Abstract: The abnormal aggregation and deposition of human islet amyloid polypeptide (hIAPP) are implicated in the pathogeny of type 2 diabetes mellitus (T2DM). Many aromatic ring-containing Ru complexes inhibit the aggregation of hIAPP. A new Ru complex Ru(bipy)(met)2¡¤3H2O (1), where bipy is 2,2?-bipyridine and met is methionine, was synthesized and employed to resist the fibril formation of hIAPP and to promote the biocompatibility of metal complexes. Two polypyridyl Ru complexes, namely [Ru(bipy)3]Cl2(2) and Ru(bipy)2Cl2(3), were used for comparison. Results reveal that the three Ru complexes can inhibit hIAPP aggregation and depolymerize mature hIAPP fibrils. Interaction studies show that Ru complexes bind to hIAPP through metal coordination, hydrophobic interaction, and other intermolecular forces. The binding of the three compounds is spontaneous and exothermic. The compounds also rescue peptide-induced cytotoxicity to some extent. Similar to 3, the novel methionine?Ru complex 1 exhibits an enhanced inhibitory effect and binding affinity to hIAPP possibly because of the smaller steric hindrance and more profitable molecular configuration of 1 than those of 2. The newly designed amino acid?Ru complex may provide new insights into the treatment of T2DM and related amyloidosis diseases. Graphical abstract: Methionine?Ru complex effectively impedes the fibril formation of human islet amyloid polypeptide. [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.category: ruthenium-catalysts. In my other articles, you can also check out more blogs about 15746-57-3

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

Application of 37366-09-9, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Article£¬once mentioned of 37366-09-9

Synthesis, spectroscopic and electronic characterizations of two half sandwich ruthenium(II) complexes with 2-(2?-hydroxyphenyl)-benzoxazole and 4-picolinic acid ligands

The [(C6H6)RuCl(HPB)] and [(C6H6)RuCl2(C5H4 NCOOH)] complexes have been prepared and studied by IR, UV-Vis spectroscopy and X-ray crystallography. The complexes was prepared in reaction of [(C6H6)RuCl2]2 with 2-(2?-hydroxyphenyl)-benzoxazole or 4-picolinic acid in methanol. The electronic spectra of the obtained compounds have been calculated using the TDDFT method. The luminescence property of the half sandwich complex [(C6H6)RuCl(HPB)] was studied by the DFT method and the mechanism was suggested.

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