Category: 1762-46-5

Reference of 1762-46-5, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 1762-46-5, Name is Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, molecular formula is C16H16N2O4. In a Article，once mentioned of 1762-46-5

The crystal structures of three complexes of dicarboxy-2,2′-bipyridyl ligands, 5,5′-dicarboxy-2,2′-bipyridyl (1) and 4,4′-dicarboxy-2,2′-bipyridyl (2) are reported. [Rh(1H)3] shows two interpenetrating, homochiral rhombohedral networks linked by short carboxylate-carboxylic acid hydrogen bonds, in which each complex acts as a node for six hydrogen bonds. [Ru(1H2)(1H)2] forms only four such hydrogen bonds, leading to the formation of heterochiral chains held together by stacking between bipyridyls. [Co(2H)3] can in principle form six hydrogen bonds, but in practice forms only four in a layer structure where stacking interactions are important. This is attributed to differences in molecular shape. Copyright 2004 The Royal Society of Chemistry

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Reference of 1762-46-5, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1762-46-5, in my other articles.

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

Reference of 1762-46-5, 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. 1762-46-5, Name is Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, molecular formula is C16H16N2O4. In a Article，once mentioned of 1762-46-5

The electronic absorption and resonance Raman spectra of the reduction products of some tris(5,5′-substituted bipyridine) complexes of iron and osmium provide “model” behavior for single-ligand localized redox orbitals.While the electron-withdrawing nature of the ethylcarboxy and phenyl substituents allows for the stable electrochemical addition of six electrons, the physical measurements are explicable within the framework developed for the tris bipyridine compounds, for which only the first three reduction products have been studied.Therefore, addition of more than one electron per ligand does not disrupt the localization mechanism for this set of iron and osmium complexes.Furthermore, the effects of ? back-bonding to these ligands are explored by comparing the results for the different metals.

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.Reference of 1762-46-5, you can also check out more blogs about1762-46-5

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

Synthetic Route of 1762-46-5, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1762-46-5, Name is Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, molecular formula is C16H16N2O4. In a Article，once mentioned of 1762-46-5

The Re(I) coordination compounds fac-Re(deeb)(CO)3(X), where deeb is 4,a¿²-(COOEt)2-2,2a¿²-bipyridine and X is I-, Br-, Cl-, or CN-, and [fac-Re(deeb)(CO)3(py)](OTf), where OTf- is triflate anion and py is pyridine, have been prepared, characterized, and anchored to nanocrystalline (anatase) TiO2. In regenerative solar cells with 0.5 M LiI-0.005 M I2 acetonitrile electrolyte, the Re(I) compounds convert absorbed photons into electrons efficiently. The rate of interfacial charge separation could not be time resolved, kcr > 108 s-1. Thermodynamically favorable recombination of the injected electron in TiO2 with the oxidized sensitizer requires milliseconds for completion. Charge recombination kinetics have been quantified on a 10-7-s and longer time scale and are insensitive to the Re sensitizer employed. The charge recombination kinetics have been contrasted with other sensitized TiO2 materials and are insensitive to an a¿¼960-mV change in apparent driving force. The results suggest that charge recombination is rate limited by diffusional encounters of the injected electron with the oxidized sensitizer. A 1999 American Chemical Society.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 1762-46-5

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

Application of 1762-46-5, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1762-46-5, Name is Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, molecular formula is C16H16N2O4. In a Article，once mentioned of 1762-46-5

Catalytically competent Ir, Re, and Ru complexes H2L 1-H2L6 with dicarboxylic acid functionalities were incorporated into a highly stable and porous Zr6O 4(OH)4(bpdc)6 (UiO-67, bpdc = para-biphenyldicarboxylic acid) framework using a mix-and-match synthetic strategy. The matching ligand lengths between bpdc and L1-L 6 ligands allowed the construction of highly crystalline UiO-67 frameworks (metal-organic frameworks (MOFs) 1-6) that were doped with L 1-L6 ligands. MOFs 1-6 were isostructural to the parent UiO-67 framework as shown by powder X-ray diffraction (PXRD) and exhibited high surface areas ranging from 1092 to 1497 m2/g. MOFs 1-6 were stable in air up to 400 C and active catalysts in a range of reactions that are relevant to solar energy utilization. MOFs 1-3 containing [Cp*Ir III(dcppy)Cl] (H2L1), [Cp*Ir III(dcbpy)Cl]Cl (H2L2), and [Ir III(dcppy)2(H2O)2]OTf (H 2L3) (where Cp* is pentamethylcyclopentadienyl, dcppy is 2-phenylpyridine-5,4?-dicarboxylic acid, and dcbpy is 2,2?-bipyridine-5,5?-dicarboxylic acid) were effective water oxidation catalysts (WOCs), with turnover frequencies (TOFs) of up to 4.8 h -1. The [ReI(CO)3(dcbpy)Cl] (H 2L4) derivatized MOF 4 served as an active catalyst for photocatalytic CO2 reduction with a total turnover number (TON) of 10.9, three times higher than that of the homogeneous complex H 2L4. MOFs 5 and 6 contained phosphorescent [Ir III(ppy)2(dcbpy)]Cl (H2L5) and [RuII(bpy)2(dcbpy)]Cl2 (H2L 6) (where ppy is 2-phenylpyridine and bpy is 2,2?-bipyridine) and were used in three photocatalytic organic transformations (aza-Henry reaction, aerobic amine coupling, and aerobic oxidation of thioanisole) with very high activities. The inactivity of the parent UiO-67 framework and the reaction supernatants in catalytic water oxidation, CO2 reduction, and organic transformations indicate both the molecular origin and heterogeneous nature of these catalytic processes. The stability of the doped UiO-67 catalysts under catalytic conditions was also demonstrated by comparing PXRD patterns before and after catalysis. This work illustrates the potential of combining molecular catalysts and MOF structures in developing highly active heterogeneous catalysts for solar energy utilization.

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

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1762-46-5, name is Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, introducing its new discovery. Application In Synthesis of Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate

The syntheses and coordination chemistry of 5,5?-di(methylene-N-aminoacidyl)-2,2?-bipyridyl ligands, where the amino acid is valine (1) or alanine (2), are presented. Complexes [M(1)3]n+, where M = Co(II), Co(III) and Fe(II), form diastereoselectively when the amine group of the amino acid arm is protonated. At higher pH the diastereoselectivity drops significantly. The solid state structure of [CoIII(1H2)3]Cl2(ClO4) 7 was determined by X-ray crystallography. Two chloride ions were found to be encapsulated by the amino acid arms of the complex via electrostatic attractions and hydrogen bonding to the protonated amine groups, as seen previously for the Fe(II) complex. No anion binding was detected in aqueous solution, but complexes [FII(1H2)2(1H)]7+ and [CoIII(1H2)3]9+ bind chloride ions in CD3OD with binding constants of 60(4) and 24(2) M-1 respectively, as determined by 1H NMR spectroscopy. 1H NMR spectroscopy suggests considerable conformational change of the ligand sidearms upon chloride binding. Complexes [FeII(2)3]2+ and [CoII(2)3]2+ are formed with d.e.’s of 33 and 56% respectively.

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 1762-46-5 is helpful to your research. Application In Synthesis of Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate

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

Chemistry is an experimental science, Recommanded Product: Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 1762-46-5, Name is Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate

The reaction of solvent substituted MoO2X2(S) 2 (X = Cl, S = THF; X = Br, S = DMF) complexes with one equivalent of bidentate nitrogen donor ligands at room temperature leads within a few minutes to the quantitative formation of complexes of the type [MoO2X 2L2] (L = 4,4?-bis-methoxycarbonyl-2,2?- bipyridine, 5,5?-bis-methoxycarbonyl-2,2?-bipyridine, 4,4?-bis-ethoxycarbonyl-2,2?-bipyridine, 5,5?-bis- ethoxycarbonyl-2,2?-bipyridine). Treatment of the complexes [MoO 2Cl2L2] with Grignard reagents at low temperatures yields dimethylated complexes of the formula [MoO 2(CH3)2L2]. [MoO2Br 2(4,4?-bis-ethoxycarbonyl-2,2?-bipyridine)], [MoO 2Br2(5,5?-bis-methoxycarbonyl-2,2?-bipyridine) ] and [MoO2Br2(5,5?-bis-ethoxycarbonyl-2,2?- bipyridine)] have been exemplary examined by single crystal X-ray analysis. The complexes were applied as homogenous catalysts for the epoxidation of cyclooctene with tert-butyl hydroperoxide (TBHP) as oxidising agent under solvent-free conditions. The complexes containing L = Cl have been additionally investigated with room temperature ionic liquids (RTILs) as solvents. The catalytic activity of the [MoO2X2L2] complexes in olefin epoxidation with tert-butyl hydroperoxide is on average very good. The main advantage of the synthesised complexes in comparison to previously reported complexes is their high solubility. This good solubility is apparently the reason that the catalytic potential of the compounds can unfold. The turnover frequencies (TOFs) in RTILs are even higher, showing the performance of the catalysts under optimised conditions.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Recommanded Product: Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1762-46-5, in my other articles.

Reference：
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, 1762-46-5, molcular formula is C16H16N2O4, introducing its new discovery. Formula: C16H16N2O4

Diastereospecific synthesis of amino-acid substituted 2,2?-bipyridyl complexes

The L-valine substituted 2,2?-bipyridyl ligand 1 forms Delta-M(1)3 (M = FeII, CoII, Co1II) complexes diastereo-specifically, with the L-valinate arms forming a chiral anion-binding pocket in the solid state.

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

Electric Literature of 1762-46-5, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.1762-46-5, Name is Diethyl [2,2′-bipyridine]-5,5′-dicarboxylate, molecular formula is C16H16N2O4. In a article£¬once mentioned of 1762-46-5

Functional metal-organic frameworks via ligand doping: Influences of ligand charge and steric demand

Doping a functional ligand into a known crystalline system built from ligands of similar shape and length provides a powerful strategy to construct functional metal-organic frameworks (MOFs) with desired functionality and structural topology. This mix-and-match approach mimics the widely applied metal ion doping (or solid solution formation) in traditional inorganic materials, such as metal oxides, wherein maintaining charge balance of the doped lattice and ensuring size match between doped metal ions and the parent lattice are key to successful doping. In this work, we prepared three sterically demanding dicarboxylate ligands based on Ir/Ru-phosphors with similar structures and variable charges (-2 to 0), [Ir(ppy)3]-dicarboxylate (L1, ppy is 2-phenylpyridine), [Ir(bpy)(ppy)2]+-dicarboxylate (L2, bpy is 2,2?-bipyridine), and Ru(bpy)3] 2+-dicarboxylate (L3), and successfully doped them into the known IRMOF-9/-10 structures by taking advantage of matching length between 4,4?-biphenyl dicarboxylate (BPDC) and L1-L3. We systematically investigated the effects of size and charge of the doping ligand on the MOF structures and the ligand doping levels in these MOFs. L1 carries a -2 charge to satisfy the charge requirement of the parent Zn 4O(BPDC)3 framework and can be mixed into the IRMOF-9/-10 structure in the whole range of H2L1/H2BPDC ratios from 0 to 1. The steric bulk of L1 induces a phase transition from the interpenetrated IRMOF-9 structure to the non-interpenetrated IRMOF-10 counterpart. L2 and L3 do not match the dinegative charge of BPDC in order to maintain the charge balance for a neutral IRMOF-9/-10 framework and can only be doped into the IRMOF-9 structure to a certain degree. L2 and L3 form a charge-balanced new phase with a neutral framework structure at higher doping levels (>8% For L2 and >6% For L3). This systematic investigation reveals the influences of steric demand and charge balance on ligand doping in MOFs, a phenomenon that has been well-established in metal ion doping in traditional inorganic materials.

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

Chemistry is traditionally divided into organic and inorganic chemistry. Computed Properties of C16H16N2O4. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 1762-46-5

Syntheses of metallo-pseudorotaxanes, rotaxane and post-synthetically functionalized rotaxane: A comprehensive spectroscopic study and dynamic properties

Herein, a bis-amido tris-amine macrocycle and five bipyridine-based bidentate chelating ligands were investigated towards various divalent transition metal ion (NiII, CoII, CuII, and ZnII)-templated syntheses of metallo [2]pseudorotaxanes. The formation of these ternary complexes was elucidated via different spectroscopic techniques such as ESI-MS, absorption spectroscopy, EPR spectroscopy, and single-crystal X-ray diffraction studies wherever possible. Azide-terminated NiII, CoII, CuII, ZnII-templated [2]pseudorotaxanes were explored to generate [2]rotaxane, ROT, via reaction with an alkyne-terminated triphenylene unit as a stopper under the mild reaction condition of the CuI-catalyzed azide-alkyne cycloaddition reaction. NiII-templated [2]pseudorotaxane was found to be the best precursor towards the high-yield synthesis of ROT. The interpenetrative nature of the center piece in metal-free rotaxane was also established through various spectroscopic techniques such as ESI-MS and 1D and 2D (COSY, NOESY, ROESY, and DOSY) NMR spectroscopy. Furthermore, ROT was functionalized via tri-acetylation as AcROT to incorporate three tertiary amides at the tris-amine centers; this AcROT exhibited rotamer-induced molecular motions in an interpenetrated system via the formation of multiple conformers/co-conformers. Additionally, the existence of multiple rotamers was established via variable-temperature NMR spectroscopic studies. Li+ and 12-crown-4 were found to be suitable for the reversible conformation/co-conformation fixation of tri-acetylated bis-amido tris-amine macrocyclic wheel-based rotaxane.

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.Computed Properties of C16H16N2O4, you can also check out more blogs about1762-46-5

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

Chemistry is traditionally divided into organic and inorganic chemistry. Formula: C16H16N2O4. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 1762-46-5

Syntheses of metallo-pseudorotaxanes, rotaxane and post-synthetically functionalized rotaxane: A comprehensive spectroscopic study and dynamic properties

Herein, a bis-amido tris-amine macrocycle and five bipyridine-based bidentate chelating ligands were investigated towards various divalent transition metal ion (NiII, CoII, CuII, and ZnII)-templated syntheses of metallo [2]pseudorotaxanes. The formation of these ternary complexes was elucidated via different spectroscopic techniques such as ESI-MS, absorption spectroscopy, EPR spectroscopy, and single-crystal X-ray diffraction studies wherever possible. Azide-terminated NiII, CoII, CuII, ZnII-templated [2]pseudorotaxanes were explored to generate [2]rotaxane, ROT, via reaction with an alkyne-terminated triphenylene unit as a stopper under the mild reaction condition of the CuI-catalyzed azide-alkyne cycloaddition reaction. NiII-templated [2]pseudorotaxane was found to be the best precursor towards the high-yield synthesis of ROT. The interpenetrative nature of the center piece in metal-free rotaxane was also established through various spectroscopic techniques such as ESI-MS and 1D and 2D (COSY, NOESY, ROESY, and DOSY) NMR spectroscopy. Furthermore, ROT was functionalized via tri-acetylation as AcROT to incorporate three tertiary amides at the tris-amine centers; this AcROT exhibited rotamer-induced molecular motions in an interpenetrated system via the formation of multiple conformers/co-conformers. Additionally, the existence of multiple rotamers was established via variable-temperature NMR spectroscopic studies. Li+ and 12-crown-4 were found to be suitable for the reversible conformation/co-conformation fixation of tri-acetylated bis-amido tris-amine macrocyclic wheel-based rotaxane.

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.Formula: C16H16N2O4, you can also check out more blogs about1762-46-5

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