Category: 76089-77-5

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, HPLC of Formula: C3CeF9O9S3, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 76089-77-5, Name is Cerium(III) trifluoromethanesulfonate, molecular formula is C3CeF9O9S3. In a Article, authors is Wang, Zhiqun，once mentioned of 76089-77-5

Cerium triflate as superoxide radical scavenger to improve cycle life of Li?O2 battery

Cerium triflate (Ce(CF3SO3)3) is used as a superoxide radical scavenger in the ether-based liquid electrolyte for the Li?O2 batteries. The radical scavenging capability of Ce3+ is evaluated both in potassium superoxide + crown solution and the Li?O2 batteries. The chemical analyses further demonstrate cerium ions can effectively slow down the decomposition of electrolyte attacked by superoxide radicals. When the capacity is fixed to 1000 mAh g?1 at a current density of 500 mA g?1, the Li?O2 battery with 1M LiTFSI-TEGDME electrolyte begins to drop its discharge voltage rapidly to 2.0 V near 40th cycle while the electrolyte with Ce3+ additives is still above 2.0 V after 88 cycles, demonstrating the cycle life of the Li?O2 batteries show remarkably improved compared to the Li?O2 batteries without any additive into electrolyte.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent， Application In Synthesis of Cerium(III) trifluoromethanesulfonate, Which mentioned a new discovery about 76089-77-5

Ce(OTf)3-catalyzed [3 + 2] cycloaddition of azides with nitroolefins: Regioselective synthesis of 1,5-disubstituted 1,2,3-triazoles

The first example of rare earth metal-catalyzed [3 + 2] cycloaddition of organic azides with nitroolefins and subsequent elimination reaction is described. In the presence of a catalytic amount of Ce(OTf)3, both benzyl and phenyl azides react with a broad range of aryl nitroolefins containing a range of functionalities selectively producing 1,5-disubstituted 1,2,3-triazoles in good to excellent yields.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Reference of 76089-77-5, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.76089-77-5, Name is Cerium(III) trifluoromethanesulfonate, molecular formula is C3CeF9O9S3. In a Article，once mentioned of 76089-77-5

Synthesis, stereocontrol and structural studies of highly luminescent chiral tris-amidepyridyl-triazacyclononane lanthanide complexes

The configuration of the remote amide chiral moiety determines the helicity of the metal complex in Ln(iii) complexes of nonadentate N6O 3 ligands based on triazacyclononane. Solution NMR studies revealed the presence of a dominant isomer whose proportion varies from 9:1 to 4:1 from Ce to Yb and X-ray crystallographic studies at 120 K of the Yb and two enantiomeric Eu complexes confirmed the configuration as S-Delta-lambda in the major isomer. Global minimisation methods allowed magnetic susceptibility and electronic relaxation times of the lanthanide ions to be estimated by analysis of variable field longitudinal relaxation rate (R1) data sets. A set of four europium complexes, containing different para-substituted pyridinyl-aryl groups, exist as one major isomer (15:1), and absorb light strongly via an ICT transition in the range 320 to 355 nm (epsilon = 55 to 65000 M-1 cm-1). The two examples absorbing light at 332 nm, possess overall emission quantum yields of 35 and 37% in aerated water, making these systems as bright as any Eu complex in solution. This journal is the Partner Organisations 2014.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthetic Route of 76089-77-5, 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. 76089-77-5, Name is Cerium(III) trifluoromethanesulfonate, molecular formula is C3CeF9O9S3. In a Article£¬once mentioned of 76089-77-5

Aldehydes vs aldimines. Unprecedented aldimine-selective nucleophilic additions in the coexistence of aldehydes using a lanthanide salt as a Lewis acid catalyst

It is well-recognized that aldimines are less reactive than aldehydes toward nucleophilic additions. In this paper, an unprecedented change in the reactivity is described: preferential reactions of aldimines over aldehydes in nucleophilic additions using a lanthanide salt as a Lewis acid catalyst. In the presence of a catalytic amount of ytterbium triflate (Yb(OTf)3), only aldimines reacted with silyl enol ethers, ketene silyl acetals, allyltributylstannane, or cyanotrimethylsilane to afford the corresponding adducts in high yields, even in the coexistence of aldehydes. Selective formation of an aldimine-Yb(OTf)3 complex rather than an aldehyde-Yb(OTf)3 complex was indicated by 13C NMR analyses. While this report demonstrates the effective use of Lewis acids in organic synthesis, the basic idea of changing reactivity as shown here will be widely applied to many other nucleophilic additions.

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.Synthetic Route of 76089-77-5, you can also check out more blogs about76089-77-5

Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, HPLC of Formula: C3CeF9O9S3, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 76089-77-5, Name is Cerium(III) trifluoromethanesulfonate, molecular formula is C3CeF9O9S3. In a Article, authors is Fiorito, Serena£¬once mentioned of 76089-77-5

Ytterbium triflate promoted solvent-free synthesis of 2-amino-4H-pyranes

2-Amino-4H-pyrane derivatives are nowadays well recognized as valuable scaffold in drug discovery. In this manuscript a new and improved multicomponent process for the chemical synthesis of the title compounds is described. beta-Dicarbonyl and activated cyanomethylene compounds, and aromatic, aliphatic or alpha,beta-unsaturated aldehydes have been subjected to a three-component reaction under the catalysis of ytterbium triflate hydrate under solvent-free conditions at 50?C, and by application of microwaves and ultrasounds. Of the three methodologies employed, the reaction in neat performed in a flask with magnetic stirring proved to be by far the most efficient, providing the desired adducts in very good yields (85?91%). The experimental protocol set-up in this study was applied without significant differences in terms of yields to aromatic aldehydes having electron withdrawing or electron-donating substituents, as well as to aliphatic and alpha,beta-unsaturated ones. Moreover ytterbium triflate has been easily recovered from each reaction media and reused without appreciable loss of its catalytic activity.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Electric Literature of 76089-77-5, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.76089-77-5, Name is Cerium(III) trifluoromethanesulfonate, molecular formula is C3CeF9O9S3. In a Article£¬once mentioned of 76089-77-5

Controlled hydrolysis of lanthanide complexes of the N-donor tripod tris(2-pyridylmethyl)amine versus bisligand complex formation

The reaction of the lanthanide salts LnI3(thf)4 and Ln(OTf)3 with tris(2-pyridylmethyl)amine (tpa) was studied in rigorously anhydrous conditions and in the presence of water. Under rigorously anhydrous conditions the successive formation of mono- and bis(tpa) complexes was observed on addition of 1 and 2 equiv of ligand, respectively. Addition of a third ligand equivalent did not yield additional complexes. The mono(tpa) complex [Ce(tpa)l3] (1) and the bis(tpa) complexes [Ln(tpa) 2]X3 (X = I, Ln = La(III) (2), Ln = Ce(III) (3), Ln = Nd(III) (4), Ln = Lu(III) (5); X = OTf, Ln = Eu(III) (6)) were isolated under rigorously anhydrous conditions and their solid-state and solution structures determined. In the presence of water, 1H NMR spectroscopy and ES-MS show that the successive addition of 1-3 equiv of tpa to triflate or iodide salts of the lanthanides results in the formation of mono(tpa) aqua complexes followed by formation of protonated tpa and hydroxo complexes. The solid-state structures of the complexes [Eu(tpa)(H2O)2(OTf) 3] (7), [Eu(tpa)(mu-OH)(OTf)2]2 (8), and [Ce(tpa)(mu-OH)(MeCN)(H2O]2I4 (9) have been determined. The reaction of the bis(tpa) lanthanide complexes with stoichiometric amounts of water yields a facile synthetic route to a family of discrete dimeric hydroxide-bridged lanthanide complexes prepared in a controlled manner. The suggested mechanism for this reaction involves the displacement of one tpa ligand by two water molecules to form the mono(tpa) complex, which subsequently reacts with the noncoordinated tpa to form the dimeric hydroxo species.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬ Application In Synthesis of Cerium(III) trifluoromethanesulfonate, Which mentioned a new discovery about 76089-77-5

Oxidation of organic compounds using a catalyzed cerium (IV) composition

A process for oxidizing aromatic and alkyl substituted aromatic compounds to quinonoid compounds by contacting an aromatic and alkyl aromatic compound with an acidic, aqueous solution of ceric oxidant in the presence of a catalytic amount of chromium cations. The present process provides a means of forming the desired quinonoid product in good yields and high selectivity.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthetic Route of 76089-77-5, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.76089-77-5, Name is Cerium(III) trifluoromethanesulfonate, molecular formula is C3CeF9O9S3. In a Article£¬once mentioned of 76089-77-5

Ce(OTf)3-catalyzed multicomponent domino cyclization- aromatization of ferrocenylacetylene, aldehydes, and amines: A straightforward synthesis of ferrocene-containing quinolines

A straightforward and economic method for the synthesis of ferrocene-containing quinolines by the Ce(OTf)3-catalyed one-pot three-component domino cyclization/aromatization reaction of ferrocenylacetylene, aldehydes, and amines under an air atmosphere was developed. A series of ferrocene substituted quinolines have been synthesized from simple and readily available starting materials in good yields.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

76089-77-5, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 76089-77-5, Name is Cerium(III) trifluoromethanesulfonate, molecular formula is C3CeF9O9S3. In a Article£¬once mentioned of 76089-77-5

Synthesis and Molecular Structures of Hydrotris(dimethylpyrazolyl)borate Complexes of the Lanthanides

The reaction of lanthanide triflates with 2 equiv of potassium hydrotris(dimethylpyrazolyl)borate (TpMe2) gives good yields of complexes of composition Ln(TpMe2)2OTf. For La (2), Ce (3), Pr (4), and Nd (5) the complexes are seven-coordinate in the solid state with the triflate group coordinated to the metal in unidentate fashion. Complex 5 crystallizes in the monoclinic space group P21/c with a = 17.629(3) A, b = 12.740(2) A, c = 18.163(3) A, beta = 107.35(1), V = 3893(1) A3, Z = 4, and Rw = 0.0458. For the complexes of Y (1), Sm (6), Eu (7), Gd (8), Dy (9), Ho (10), and Yb (11), the smaller size of the metal ion leads to ejection of the triflate from the coordination sphere and the complexes are ionic in the solid state with a six-coordinate metal center. Complex 11 crystallizes in the monoclinic space group C2/m with a = 16.593(7) A, b = 13.671(5) A, c = 8.746(2) A, beta = 91.66(3), V = 1983(1) A3, Z = 2, and Rw = 0.0416. In solution, however, complex 6 adopts a seven-coordinate molecular structure with the triflate ion within the first coordination sphere.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. 76089-77-5, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 76089-77-5, in my other articles.

Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 76089-77-5, molcular formula is C3CeF9O9S3, introducing its new discovery. 76089-77-5

POLYDENTATE LIGAND METAL COMPLEX

The present invention provides a metal complex that has excellent durability, and a device and the like having excellent durability that uses such a metal complex. Specifically, the present invention provides a metal complex comprising (a) a polydentate ligand having denticity of five or more that includes a heteroaromatic ring which contains two or more atoms selected from the group consisting of a nitrogen atom, an oxygen atom, and a sulfur atom, and (b) an ion of a metal selected from the group consisting of cerium, praseodymium, ytterbium, and lutetium; a composition comprising the metal complex and a charge transport material; an organic thin film obtained by using the metal complex or composition; and a device obtained by using the metal complex, composition, or organic thin film.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI