Tag: M.W:700-800

Electric Literature of 92361-49-4. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 92361-49-4, Name is Chloro(pentamethylcyclopentadienyl)bis(triphenylphosphine)ruthenium(II)

The catalytic activity of a series of ruthenium(II) complexes in azide-alkyne cycloadditions has been evaluated. The [Cp*RuCl] complexes, such as Cp*RuCl(PPh3)2, Cp*RuCI(COD), and Cp*RuCl(NBD), were among the most effective catalysts. In the presence of catalytic Cp*RuCI(PPh3)2 or Cp*RuCl(COD), primary and secondary azides react with a broad range of terminal alkynes containing a range of functionalities selectively producing 1,5-disubstituted 1,2,3-triazoles; tertiary azides were significantly less reactive. Both complexes also promote the cycloaddition reactions of organic azides with internal alkynes, providing access to fully-substituted 1,2,3-triazoles. The ruthenium-catalyzed azide-alkyne cycloaddition (RuAAC) appears to proceed via oxidative coupling of the azide and alkyne reactants to give a six-membered ruthenacycle intermediate, in which the first new carbon-nitrogen bond is formed between the more electronegative carbon of the alkyne and the terminal, electrophilic nitrogen of the azide. This step is followed by reductive elimination, which forms the triazole product. DFT calculations support this mechanistic proposal and indicate that the reductive elimination step is rate-determining.

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

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. 32993-05-8, C41H35ClP2Ru. A document type is Patent, introducing its new discovery., category: ruthenium-catalysts

The present invention relates to can be used as pharmaceutical intermediates shown in a following formula (III) diaryl-substituted imidazoles synthetic method, said method comprising: in the organic solvent, in catalyst, organic ligand and the presence of acid promoter, the following formula (I) compound, the compound of formula (II) compounds and radical reaction, after-treatment after reaction, so as to obtain the compound of said formula (III), wherein R 1, R 2 each independently selected from H, C 1-C 6 alkyl, C 1-C 6 alkoxy or halogen; X is halogen. The method adopts the specific reaction substrate, and through the catalyst, organic ligand, acidic promoter and organic solvent and in the comprehensive selective, thus can yield to obtain the target product, the imidazole compound of this kind the successful preparation, optimizes a synthesis process, improving the product yield, is very favorable to the large-scale production, has a broad market application prospect. (by machine translation)

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

Electric Literature of 32993-05-8, 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.32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a patent, introducing its new discovery.

Two homo-trinuclear complexes [{(eta5-C5Me5)RhCl}3(mu3-L)] (1) and [{(eta5-C5H5)Ru(PPh3)}3(mu3-L)] (2) (H3L = 2,4,6-trimercapto-1,3,5-triazine) are reported. Both the complexes have been fully characterized by elemental analyses, FAB-MS, IR, NMR, electronic and emission spectral techniques. Molecular structure of 1 has been authenticated by single crystal X-ray diffraction analyses. Complex 1 revealed the strong intra- and inter-molecular C-H?X (X = Cl, pi) and pi-pi stacking interactions, which play important roles to stabilize crystal space packing. Furthermore, the pi-pi interactions in 1 lead to a double-helical motif.

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

Related Products of 32993-05-8. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

Reactions between <(L2 = 1,2-bis(diphenylphosphino)ethane (dppe) and 1,2-bis(phenylphosphino)methane (dppm)>, and 1-ethynylpyrene , in the presence of NH4PF6, NaBF4 or NaBPh4, have given the corresponding cationic eta’-vinylidene complexes.These cations are readily deprotonated to give the corresponding eta’-ethynyl complexes.They have been characterised on the basis of elemental analyses and spectroscopic studies.The cationic and neutral products have been further treated with methanol and higher alcohols and the resulting products characterised.

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

Electric Literature of 32993-05-8. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II). In a document type is Article, introducing its new discovery.

Hexasubstitution of apical triflate ligands in the octahedral clusters [M]2[Mo6X8(CF3SO3) 6] (M = n-Bu4N or Cs, X = Br or I) and monosubstitution in [n-Bu4N]2[Mo6Br13(CF 3SO3)] was carried out in tetrahydrofuran at 60C with simple pyridines and then extended to organometallic pyridines, yielding cluster-cored stars, and to dendronic polyallyl-and polyferrocenylpyridines, yielding cluster-cored polyallyl and polyferrocenyl dendrimers and dendrons. The orange pyridine-substituted clusters, whose pyridine protons are deshielded in 1H NMR (a practical tool for characterization), are air-stable and thermally stable with simple pyridines, light- and air-sensitive with organometallic pyridines, and air-fragile and thermally fragile with large dendronized pyridines.

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

Synthetic Route of 92361-49-4, An article , which mentions 92361-49-4, molecular formula is C46H45ClP2Ru. The compound – Chloro(pentamethylcyclopentadienyl)bis(triphenylphosphine)ruthenium(II) played an important role in people’s production and life.

The 31P NMR spectra of CpRu(PR3)2Cl and Cp?Ru(PR3)2Cl complexes with PR3 = PMe3, PPhMe2, PPh2Me, PPh3, PEt3, PnBu3 have been measured; these data correlate with and can be used to predict Ru-P bond distances and enthalpies. Their 31P NMR coordination chemical shifts (delta(ppm) = deltacomplex – deltafree) show significant linear correlations with literature values of both the enthalpies of the ligand exchange reactions to form the Ru-P bonds and the average Ru-P bond distances from crystal structures. The strong correlation between Delta (ppm) and Ru-P distance can be extended to include the first-generation Grubbs metathesis catalyst (PCy3)2Cl2Ru=C(H)Ph and four of its derivatives, (PCy3)2Cl2Ru=C(H)(p-C6H4X) (X = OCH3, CH3, Cl, Br), the four related Fischer carbenes (PCy3)2Cl2Ru=C(H)ER (ER = OEt, SPh, N(carbazole), N(pyrrolidinone)), the second-generation Grubbs catalyst (PCy3)(IMes)Cl2Ru=C(H)Ph, and its derivative (PCy3)(IMes)Cl2Ru=C(H)OEt. Other significant correlations in the Cp?Ru(PR3)2Cl complexes are found between the enthalpies of reaction and Ru-P bond distances and between the cone angle and the Ru-P enthalpy, Ru-P bond distance, and Delta(ppm) values. The 31P NMR shifts for six phosphines correlate nearly linearly with their crystallographic cone angles, allowing prediction of cone angles from 31P NMR data.

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

Reference of 32993-05-8, 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. 32993-05-8, C41H35ClP2Ru. A document type is Article, introducing its new discovery.

Reaction of the ruthenium complexes [RuCl2(EPh3)3] (E = P, As), [(eta5-C5H5)RuCl(EPh3)2] (E = P, As), [(eta5-C5Me5)RuCl(PPh3)2] and [(eta5-C9H7)RuCl(PPh3)2] with 2,6-diacetylpyridinemonoxime (dapmoH) have been investigated. Compounds with the formulations [Ru(kappa3-dapmoH)Cl(PPh3)2]PF6 (1), [Ru(kappa3-dapmoH)Cl(PPh3)2]BF4 (2) and [Ru(kappa3-dapmoH)Cl(AsPh3)2]Cl (3) have been isolated and fully characterized by elemental analyses, IR, NMR, electronic, emission spectral and electrochemical studies. Molecular structures of the complexes [Ru (kappa3 -dapmoH) Cl (PPh3)2] PF6 · H2 O (1) and [Ru (kappa3 -dapmoH) Cl (PPh3)2] BF4 · 1.5 H2 O (2) have been determined by single crystal X-ray diffraction studies. A structural feature of interest for both the compounds is that the counter anions in 1 and 2 play vital role in the self-assembly of cages through intermolecular weak interactions in which water dimers or trimers are encapsulated. Compounds 1 and 2 strongly emit upon excitation at their respective MLCT transitions.

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

Application of 32993-05-8. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

Ruthenium piano-stool complexes incorporating the new bidentate aminoalkylphosphine ligand 1,2-bis(dipyrrolidin-1-ylphosphino)ethane (dpyrpe, I) or its monodentate counterpart bis(pyrrolidin-1-yl)methylphosphine (pyr 2PMe, II) have been prepared, [(C5R5)RuCl(PP)] (R = Me and PP = dpyrpe, 1; R = Me and PP = (pyr2PMe)2, 2; R = H and PP = dpyrpe, 3). Complexes 2 and 3 have been characterized by X-ray crystallography. Complexes 1 and 2 react with NaBAr4f in the presence of ligand L to yield [Cp*Ru(L)(dpyrpe-kappa2P)] [BArf4] (L = MeCN, 4a; CO, 4b; N2, 4c) and [Cp*Ru(L)(pyr2PMe)2][BAr4f] (L = MeCN, 5a; CO, 5b; N2, 5c). Complex 4a was crystallographically characterized. The CO complexes 4b and 5b were examined using IR spectroscopy in an attempt to establish the electron-donating capabilities of I and II. Complex 1 oxidatively adds H2 in the presence of NaBAr4 f to yield the Ru(IV) dihydride [Cp*RuH2(dpyrpe- kappa2P)][BAr4f], 7.

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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. 92361-49-4, Name is Chloro(pentamethylcyclopentadienyl)bis(triphenylphosphine)ruthenium(II), molecular formula is C46H45ClP2Ru. In a Article，once mentioned of 92361-49-4, Application In Synthesis of Chloro(pentamethylcyclopentadienyl)bis(triphenylphosphine)ruthenium(II)

Regioselective syntheses of 1,4,5-trisubstituted 1,2,3-triazoles were accomplished by three different strategies, relying on (i) the interception of stoichiometrically formed 5-cuprated-1,2,3-triazoles, (ii) the use of stoichiometrically functionalized alkynes or (iii) catalytic C-H bond functionalizations. This perspective article summarizes progress in this research area until June 2010.

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 Chloro(pentamethylcyclopentadienyl)bis(triphenylphosphine)ruthenium(II). In my other articles, you can also check out more blogs about 92361-49-4

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

Reference of 32993-05-8. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

Anticancer activity of the new [Ru(eta5-C5H 5)(PPh3)(Me2bpy)][CF3SO 3] (Me2bpy = 4,4?-dimethyl-2,2?-bipyridine) complex was evaluated in vitro against several human cancer cell lines, namely A2780, A2780CisR, HT29, MCF7, MDAMB231 and PC3. Remarkably, the IC50 values, placed in the nanomolar and sub-micromolar range, largely exceeded the activity of cisplatin. Binding to human serum albumin, either HSA (human serum albumin) or HSAfaf (fatty acid-free human serum albumin) does not affect the complex activity. Fluorescence studies revealed that the present ruthenium complex strongly quench the intrinsic fluorescence of albumin. Cell death by the [Ru(eta5-C5H5)(PPh 3)(Me2bpy)][CF3SO3] complex was reduced in the presence of endocytosis modulators and at low temperature, suggesting an energy-dependent mechanism consistent with endocytosis. On the whole, the biological activity evaluated herein suggests that the complex could be a promising anticancer agent.

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