Tag: M.W:400-500

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., COA of Formula: C12H12Cl4Ru2

Selective Photoinactivation of Methicillin-Resistant Staphylococcus aureus by Highly Positively Charged RuII Complexes

Ruthenium(II) polypyridyl complexes featuring peripheral quaternary ammonium structures were found to be able to selectively inactivate Gram-positive Staphylococcus aureus (S. aureus), including methicillin-resistant S. aureus (MRSA) upon visible light irradiation, but have low phototoxicity toward 293T cells, L02 cells and lack hemolysis toward rabbit red blood cells (RBC), exhibiting promising potential as a novel type of antimicrobial photodynamic therapy (aPDT) agents.

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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. 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Article£¬once mentioned of 37366-09-9, Formula: C12H12Cl4Ru2

Cyclometalated Ruthenium Catalyst Enables Ortho-Selective C?H Alkylation with Secondary Alkyl Bromides

Although Ru-catalyzed meta-selective sp2 C?H alkylation with secondary alkyl halides is well established, ortho selectivity has never been achieved. We demonstrate that the use of a cyclometalated Ru-complex, RuBnN, as the catalyst results in a complete switch of the inherent meta-selectivity to ortho selectivity in the Ru-catalyzed sp2 C?H alkylation reaction with unactivated secondary alkyl halides. The high catalytic activity of RuBnN allows mild reaction conditions that result in a transformation of broad scope and versatility. Preliminary mechanistic studies suggest that a bis-cycloruthenated species is the key intermediate undergoing oxidative addition with the alkyl bromides, thus avoiding the more common SET pathway associated with meta-selectivity. Direct C?H functionalization is a powerful tool for milder and more environmentally friendly syntheses of biologically active compounds, as well as offering easy access to unexplored chemical space in drug discovery. However, major challenges remain for these methods to be widely applicable. The development of new catalysts with diverse and superior reactivity is key to address these challenges. Here, we show for the first time that cyclometalated Ru-complexes are able to catalyze the directed ortho-C?H alkylation of arenes with secondary alkyl bromides, enabling the late-stage functionalization and diversification of pharmaceuticals. The obtained regioselectivity is in stark contrast to that delivered by the commonly used arene-bound Ru-complexes, which afford exclusive meta-alkylation. Our work points a way to further rationally design next-generation Ru-catalysts with improved control over selectivity and reactivity, and a richer synthetic toolbox for chemists in the future. Here, we report the first ortho-selective sp2 C?H bond alkylation with secondary alkyl bromides in the Ru catalytic platform, enabled by cyclometalated ruthenium(II) complex RuBnN. Mechanistic studies indicate that the formation of a bis-cycloruthenated intermediate enables an oxidative addition to occur, thus avoiding the single-electron transfer (SET) pathway associated with meta-selectivity in other Ru catalytic systems. The reaction is tolerant of a variety of medicinally relevant functional groups and has been used to modify existing pharmaceuticals.

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

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

Synthetic Route of 37366-09-9. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer. In a document type is Article, introducing its new discovery.

Einschlussverbindungen von Aromatruthenium-Komplexen mit Cyclodextrinen

Cyclodextrins form with some aromatic ruthenium complexes crystalline inclusion compounds, the reaction being very selective regarding the geometry and the functional groups of the guest molecule.The structure of the 2:1 inclusion compound of benzene(cyclopentadienyl)ruthenium(II)-hexafluorophosphate with alpha-cyclodextrin was elucidated by an X-ray structure analysis.

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

Electric Literature of 37366-09-9. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer. In a document type is Article, introducing its new discovery.

Redox chemistry and electronic properties of 2,3,5,6-tetrakis(2-pyridyl) pyrazine-bridged diruthenium complexes controlled by N.C.N-biscyclometalated ligands

To investigate the consequences of cyclometalation for electronic communication in dinuclear ruthenium complexes, a series of 2,3,5,6-tetrakis(2- pyridyl)pyrazine (tppz) bridged diruthenium complexes was prepared and studied. These complexes have a central tppz ligand bridging via nitrogen-to-ruthenium coordination bonds, while each ruthenium atom also binds either a monoanionic, N, C, N-terdentate 2,6-bis(2-pyridyl)phenyl (R-N-C-N) ligand or a 2,2I:6I, 2II-terpyridine (tpy) ligand. The N, C, NI-, that is, biscyclometalation, instead of the latter N, NI, NII-bonding motif significantly changes the electronic properties of the resulting complexes. Starting from well-known [{Ru(tpy)}2(mu-tppz)]4+ (tpy = 2,2I:2 II, 6-terpyridine) ([3]4+) as a model compound, the complexes [{Ru(R-N-C-N)}(mu-tppz){Ru(tpy)}]3+ (R-N-C(H)-N = 4-R-1,3-dipyridylben-zene, R = H ([4a] 3+), CO2Me ([4b]3+)), and [{Ru(R-N -C-N)}2(mu-tppz)]2+, (R = H ([5a]2+), CO2Me ([5b]2+)) were prepared with one or two N, C, NI-cyclometalated terminal ligands. The oxidation and reduction potentials of cyclometalated [4]3+ and [5]2+ are shifted negatively compared to non-cyclometalated [3]4+, the oxidation processes being affected more significantly. Compared to [3] 4+, the electronic spectra of [5]2+ display large bathochromic shifts of the main MLCT transitions in the visible spectral region with low-energy absorptions tailing down to the NIR region. One-electron oxidation of [3]4+ and [5]2+ gives rise to low-energy absorption bands. The comproportionation constants and NIR band shape correspond to delocalized Robin-Day class III compounds. Complexes [4a]3+ (R = H) and [4b]3+ (R = CO2Me) also exhibit strong electronic communication, and notwithstanding the large redox-asymmetry the visible metal-to-ligand charge-transfer absorption is assigned to originate from both metal centers. The potential of the first, ruthenium-based, reversible oxidation process is strongly negatively shifted. On the contrary, the second oxidation is irreversible and cyclometalated ligand-based. Upon one-electron oxidation, a weak and low-energy absorption arises.

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

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Organometallic ruthenium, rhodium and iridium complexes containing a P-bound thiophene-2-(N-diphenylphosphino)methylamine ligand: Synthesis, molecular structure and catalytic activity

Reaction of Ph2PNHCH2-C4H3S with [Ru(eta6-p-cymene)(mu-Cl)Cl]2, [Ru(eta6-benzene)(mu-Cl)Cl]2, [Rh(mu-Cl)(cod)] 2 and [Ir(eta5-C5Me5)(mu-Cl)Cl] 2 yields complexes [Ru(Ph2PNHCH2-C 4H3S)(eta6-p-cymene)Cl2], 1, [Ru(Ph2PNHCH2-C4H3S) (eta6-benzene)Cl2], 2, [Rh(Ph2PNHCH 2-C4H3S)(cod)Cl], 3 and [Ir(Ph 2PNHCH2-C4H3S)(eta5- C5Me5)Cl2], 4, respectively. All complexes were isolated from the reaction solution and fully characterized by analytical and spectroscopic methods. The structure of [Ru(Ph2PNHCH 2-C4H3S)(eta6-benzene)Cl 2], 2 was also determined by single crystal X-ray diffraction. 1-4 are suitable precursors forming highly active catalyst in the transfer hydrogenation of a variety of simple ketones. Notably, the catalysts obtained by using the ruthenium complexes [Ru(Ph2PNHCH2-C 4H3S)(eta6-p-cymene)Cl2], 1 and [Ru(Ph2PNHCH2-C4H3S) (eta6-benzene)Cl2], 2 are much more active in the transfer hydrogenation converting the carbonyls to the corresponding alcohols in 98-99% yields (TOF ? 200 h-1) in comparison to analogous rhodium and iridium complexes.

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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, Computed Properties of C12H12Cl4Ru2

Syntheses, structures and immobilization of arene-ruthenium complexes bearing phosphine ligands with methoxysilyl groups

Condensation of 3-aminopropyltrimethoxysilane and chlorodiphenylphosphine in the molar ratio of 1:1 and 1:2 in the presence of Et3N in toluene afforded aminophosphine (CH3O)3Si(CH2)3NHPPh2 (L1) and bisphosphinoamine (CH3O)3Si(CH2)3N(PPh2)2 (L2) with methoxysilyl groups, respectively. Treatment of [(eta6-C6H6)RuCl2]2 with L1 in refluxing tetrahydrofuran gave a mononuclear ruthenium phosphine complex [(eta6-C6H6)RuCl2(kappa1-P-L1)] (1). Reaction of [(eta6-p-cymene)RuCl2]2 with L2 under the similar condition gave a dinuclear ruthenium phosphine complex [(eta6-p-cymene)Ru(mu-Cl)3RuCl(kappa2-P,P-L2)] (2). Complexes 1 and 2 were characterized by microanalyses, IR and NMR spectroscopies, and their structures were also established by single-crystal X-ray diffraction. Immobilization of complexes 1 and 2 on SBA-15, and characterization of these hybrid heterogeneous catalysts were studied by transmission electron microscopy (TEM), IR and low pressure N2 adsorption/desorption measurement. The heterogeneous catalysts were also briefly tested for transfer hydrogenation of acetophenone.

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

Synthetic Route 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.

The stannylene {2,6-(Me2NCH2)2C 6H3}SnCl as a ligand in transition metal complexes of palladium, ruthenium, and rhodium

The cleavage of the chloride bridge in the dimeric transition complexes [(eta3-C3H5)Pd]2(mu-Cl)2, [{eta6-benzene)RuCl]2(mu-Cl)2, [(eta6-cymene)RuCl]2(mu-Cl)2, [(CO) 3RuCl]2(mu-Cl)2, and [(CO) 2Rh]2(mu-Cl)2 by heteroleptic LSnCl stannylene (L is a N,C,N-pincer ligand [2,6-(Me2NCH2) 2C6H3]) resulted in the isolation of Pd II-SnII, RuII-SnII, and Rh I-SnII complexes [Pd(eta3-C3H 5)(LSnCl)Cl] (2), [Ra(eta6-benzene)(LSnCl)Cl 2] (3), [Ru(eta6-cymene)(LSnCl)Cl2] (4), [Ru(CO)3(LSnCl)Cl2] (5), and [Rh-(CO)2(LSnCl) Cl] (6). All compounds were characterized by NMR and IR spectroscopy, and the structures of compounds 2 and 4 were determined by X-ray diffraction analysis. The structure of a rare monomeric RhII – SnII complex, [Rh(LSnCl)2Cl2] (7), the final decomposition product of RhI – SnII complex 6, is also reported.

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

Electric Literature 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.

Catalytic isomerization of allylic alcohols promoted by complexes [RuCl2(eta6-arene)(PTA-Me)] under homogeneous conditions and supported on Montmorillonite K-10

The mononuclear arene-ruthenium(II) derivatives [RuCl2(eta 6-arene)(PTA-Me)] (arene = C6H6 (3a), p-cymene (3b), 1,3,5-C6H3Me3 (3c), C6Me 6 (3d)), containing the ionic phosphine ligand 1-methyl-3,5-diaza-1- azonia-7-phosphaadamantane chloride (PTA-Me), have been synthesized and fully characterized. These complexes were evaluated as potential catalysts for the redox isomerization of allylic alcohols. Among them, best results in terms of activity were obtained with complex [RuCl2(eta6-C 6H6)(PTA-Me)] (3a) which, in combination with K 2CO3 (2.5 equiv. per Ru), was able to selectively isomerize a number of allylic alcohols RCH(OH)CHCH2 (R = H, aryl, alkyl or heteroaryl group) into the corresponding carbonyl compounds RC(O)CH2CH3 in refluxing THF (TOF values up to 800 h -1). Complex [RuCl2(eta6-C6H 6)(PTA-Me)] (3a) was adsorbed onto the Montmorillonite K-10 clay, and the resulting solid proved also active in the isomerization of the model substrate 1-octen-3-ol. In addition, it could be easily separated from the reaction media by simple filtration and reused several times (up to 11 consecutive runs) with retention of its efficiency.

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Reference£º
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, Recommanded Product: Dichloro(benzene)ruthenium(II) dimer

Water Oxidation by Ruthenium Complexes Incorporating Multifunctional Bipyridyl Diphosphonate Ligands

We describe herein the synthesis and characterization of ruthenium complexes with multifunctional bipyridyl diphosphonate ligands as well as initial water oxidation studies. In these complexes, the phosphonate groups provide redox-potential leveling through charge compensation and sigma donation to allow facile access to high oxidation states. These complexes display unique pH-dependent electrochemistry associated with deprotonation of the phosphonic acid groups. The position of these groups allows them to shuttle protons in and out of the catalytic site and reduce activation barriers. A mechanism for water oxidation by these catalysts is proposed on the basis of experimental results and DFT calculations. The unprecedented attack of water at a neutral six-coordinate [RuIV] center to yield an anionic seven-coordinate [RuIV?OH]?intermediate is one of the key steps of a single-site mechanism in which all species are anionic or neutral. These complexes are among the fastest single-site catalysts reported to date.

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.Recommanded Product: Dichloro(benzene)ruthenium(II) dimer, you can also check out more blogs about37366-09-9

Reference£º
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.Recommanded Product: 37366-09-9

Complete chiral induction from enantiopure 1,2-diamines to benzophenone-based achiral bisphosphane ligands in noyori-type RuII catalysts

We report the design and synthesis of a novel class of RuII catalysts (3) composed of achiral benzophenone-based bisphosphane ligands and enantiopure 1,2-diamines for the asymmetric hydrogenation of aryl ketones. The developed catalysts show excellent enantioselectivities (up to 97 % ee) and activities (up to S/C = 10,000) in the hydrogenation of a variety of aromatic ketones. Complete chiral induction from the enantiopure 1,2-diamine to the achiral bisphosphane ligand was observed. The coordination of the C=O moiety in 3 to the cationic RuII center is considered to be of key importance in providing a higher thermodynamic and kinetic rotation barrier for the flexible bisphosphane ligand, resulting in the preferential formation of only one diastereomer, and thus explaining the high enantioselectivity of the catalyst. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.

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