Category: chiral-nitrogen-ligands

Application of 108-47-4, In homogeneous catalysis, catalysts are in the same phase as the reactants. Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 108-47-4, Name is 2,4-Dimethylpyridine, molecular formula is C7H9N. In a Article，once mentioned of 108-47-4

Synthesis and characterization of the adducts of bis(O-amyldithiocarbonato) nickel(II) with nitrogen donors and X-ray structure of bis(O- amyldithiocarbonato)bis (3,5-dimethylpyridine)nickel(II)

A series of complexes with general formula M(Xan)2L2 (M = Ni(II), Xan = O-amyldithiocarbonato, L = 3-methylpyridine, 2,4-; 3,4-; 3,5-dimethylpyridines and 2,4,6-trimethylpyridine) have been synthesized and characterized by elemental analysis and various physico-chemical techniques such as magnetic susceptibility measurements, conductivity measurements, UV-Visible, Infrared spectral data. On the basis of electronic spectra and magnetic susceptibility measurements, an octahedral geometry has been proposed for all the complexes. IRspectral data shows that the substituted pyridines in all these complexes coordinate to the metal ion through nitrogen atoms occupying fifth and sixth axial positions where as O-alkyldithiocarbonate act as monoanion bidentate ligand and occupy the planar positions of octahedral structures. The X-ray diffraction analysis of one of the adducts bis(O-amyldithiocarbonato) bis(3,5-dimethylpyridine) nickel(II) is also investigated. The complex crystallizes in the monoclinic space group P21/c with unit cell parameters a = 9.167(2) A, b = 18.255(4) A, c = 9.299(2) A and beta = 103.47(2). The dihedral angle between dithio-groups and the pyridine ring is 88.9(1). The crystal structure of the molecule is stabilized by pi-pi interactions. Springer Science+Business Media New York 2012.

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Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Chemistry is a science major with cience and engineering. The main research directions are chemical synthesis, new energy materials, nano-ceramics, nano-hybrid composite materials, preparation and modification of special coatings, In an article, 126456-43-7, name is (1S,2R)-1-Amino-2,3-dihydro-1H-inden-2-ol, introducing its new discovery. category: chiral-nitrogen-ligands

First direct reductive amination of mucochloric acid: a simple and efficient method for preparing highly functionalized alpha,beta-unsaturated gamma-butyrolactams.

[reaction: see text] The first direct reductive amination of mucochloric acid (1) has been accomplished. Reaction of 1 with various alkyl, aryl, and benzylamines, followed by reduction in the same pot, provides an efficient method of obtaining N-benzyl-3,4-dichloro-1,5-dihydro-pyrrol-2-one and N-aryl (or alkyl)-3,4-dichloro-1,5-dihydro-pyrrol-2-ones.

The design and synthesis of related molecules that are more effective, more selective, and less toxic than aspirin are important objectives of biomedical research.category: chiral-nitrogen-ligands, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 126456-43-7, in my other articles.

Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Reference of 492-08-0, Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.492-08-0, Name is (+)-Sparteine, molecular formula is C15H26N2. In a article，once mentioned of 492-08-0

Studies on the complex formation between lactams and thiolactams of sparteine with copper(II) cation

The complex formation for lactams and thiolactams of sparteine with Cu(II) cation in ethanol was studied by theoretical, kinetic and MS methods. The studied compounds with Cu(II) cation formed 1:1 and 1:2 complexes. The kinetic parameters of their formation were determined. Both kinetic and thermodynamic parameters depend strongly on the presence of oxo- or thiono-group in sparteine skeleton.

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Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

In heterogeneous catalysis, catalysts provide a surface to which reactants bind in a process of adsorption. category: chiral-nitrogen-ligands, Name is (1S,2R)-1-Amino-2,3-dihydro-1H-inden-2-ol, belongs to chiral-nitrogen-ligands compound, is a common compound. category: chiral-nitrogen-ligandsCatalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. In an article, authors is Tak, Rajkumar, once mentioned the new application about category: chiral-nitrogen-ligands.

Enantioselective syntheses of beta-amino alcohols catalyzed by recyclable chiral Fe(III) metal complex

An efficient asymmetric desymmetrization of meso-epoxides with anilines catalysed by a series of simple and environmentally benign in situ generated Fe(iii) complexes based on chiral tridentate ligands L1-L7 with achiral and chiral linkers (methylene, piperazine, R/S BINOL and diethyl tartrate) was carried out at rt. The in situ generated iron metal complex based on ligand L5a emerged as improved (low catalyst loading) catalyst for asymmetric desymmetrization of meso-epoxides with anilines giving high enantioselectivity (up to 99%) and high yield (95%) of enantiopure beta-amino alcohols in 14 h. While excellent results for ARO of cyclic as well as aliphatic epoxides with anilines was achieved with in situ generated complex from the ligand L4h and Fe(iii) chloride, the catalyst was recoverable and recyclable (five times) with retention of its performance.

The design and synthesis of related molecules that are more effective, more selective, and less toxic than aspirin are important objectives of biomedical research.category: chiral-nitrogen-ligands, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 126456-43-7, in my other articles.

Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Related Products of 126456-43-7, In some cases, the catalyzed mechanism may include additional steps. Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. 126456-43-7, Name is (1S,2R)-1-Amino-2,3-dihydro-1H-inden-2-ol,introducing its new discovery.

Reusable chiral bis(oxazoline)-copper complexes immobilized by donor-acceptor interactions on insoluble organic supports

Heterogeneous asymmetric Diels-Alder reactions between cyclopentadiene and 3-but-2-enoyl-oxazolidin-2-one were efficiently promoted by reusable chiral bis(oxazoline)-copper catalysts, immobilized through charge transfer interactions with trinitrofluorenone, that was covalently grafted on Merrifield resins. The modified support was also used for the synthesis of both enantiomers of the target product, thanks to the non-covalent anchoring of the catalyst that allowed its easy removal and exchange.

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Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Electric Literature of 108-47-4, Chemistry, like all the natural sciences, begins with the direct observation of nature— in this case, of matter.108-47-4, Name is 2,4-Dimethylpyridine, molecular formula is C7H9N. Belongs to chiral-nitrogen-ligands compound. In a article，once mentioned of 108-47-4

Crystal Structures of Three Adducts of Zinc Azide with Dimethylpyridines

Three adducts of zinc azide with 2,4-/3,4- and 3,5-dimethylpyridine (DMP), respectively, were prepared and the crystal structures determined by single crystal X-ray diffraction methods.The three compounds crystallize in the monoclinic space group P21/c with Z = 4: Zn(N3)2*2,4-DMP at 300(2) K: a = 1098.6(4), b = 1600.2(6), c = 608.8(3) pm, beta = 102.47(3) deg; R = 0.071 (RW = 0.056).Zn(N3)2*3,4-DMP at 103(3) K: a = 1102.1(3), b = 1.649.0(4), c = 611.8(1) pm, beta = 104.54(2) deg; R = 0.055 (RW = 0.051).Zn(N3)2*3,5-DMP at 97(3) K: a = 602.1(2), b = 2037.9(7), c = 853.8(3) pm, beta = 90.77(3) deg; R = 0.069 (RW = 0.055).The molecular geometry is similar for the three adducts, but the packing of the DMP-molecules is different.The zinc atoms are surrounded by five nitrogen atoms, four belonging to the azide groups and one to the DMP-adduct.The trigonal bipyramidal shaped ZnN5-polyhedra share common edges to form chains.Keywords.Azide; Crystal structure; Dimethylpyridine; Zinc.

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Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

In heterogeneous catalysis, catalysts provide a surface to which reactants bind in a process of adsorption. Safety of 2,4-Dimethylpyridine, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.108-47-4, name is 2,4-Dimethylpyridine. In an article，Which mentioned a new discovery about 108-47-4

A review of inhibitors for the corrosion of transition metals in aqueous acids

The importance of the electrical double layer at the interface between a metal and an acid electrolyte together with its interaction with organic and inorganic molecules to produce initially electrostatic adsorption are highlighted. In some cases, a chemical bond is formed involving charge transfer or charge sharing between the metal surface and inhibitor molecules forming a coordinate bond through lone-pair electrons on heteroatoms or pi electrons on inhibitors with multiple and aromatic bonds. The application of mathematical formulae to the variation in adsorbed inhibitor molecules at the metal surface is considered, with inhibitor concentration isotherms considering thermodynamic principles or the water displacement reaction where for an inhibitor molecule to adsorb at a metal surface several water molecules must be displaced first. The predominant ways in which molecules enable inhibition are formation of a physical barrier where a physical adsorbed barrier of molecules (usually polymeric or oxide promoting for this mode to predominant) impede movement near the metal surface or reduction in metal reactivity where chemisorbed inhibitor molecules adhere to active sites on the metals reducing the number of cathodic and anodic sites. Adsorption involving charged inhibitor species causes a change in the double layer and the potential at the outer Helmholtz plane, influencing the corrosion rates of both anodic and cathodic reactions. The first three modes are intimately with adsorption and the double layer the last involves interaction of the inhibitor molecules and the intermediate products formed during the partial electrochemical reactions, interaction of the adsorbed intermediates with organic molecules can either decrease (inhibit) or increase (stimulate) electrode reaction rate depending on the stability of the inhibitor-intermediate complex formed.

The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. Safety of 2,4-Dimethylpyridine, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 108-47-4, in my other articles.

Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Reference of 108-47-4, 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. 108-47-4, Name is 2,4-Dimethylpyridine, molecular formula is C7H9N. In a Article，once mentioned of 108-47-4

HIGH PRESSURE NQR STUDIES OF HYDROGEN BONDS FOR COMPLEXES OF PENTACHLOROPHENOL WITH NITROGEN BASES

The NQR spectrum of 35Cl nuclei for complexes of pentachlorophenol with nitrogen bases has been studied as a function of pressure and temperature.It is shown that the value of the pressure coefficient of the NQR frequency is related to the degree of proton transfer.A distinct anomaly of the pressure coefficient of the NQR frequency in the vicinity of 50percent proton transfer hydrogen bonds has been observed.The phenomena have been interpreted on the basis of the Matsushita and Matsubara model and by assuming the pressure dependence of proton transfer equilibrium.The influence of the crystal effect and torsional vibrations on the temperature-pressure characteristics of the NQR spectrum is discussed.

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Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

In heterogeneous catalysis, catalysts provide a surface to which reactants bind in a process of adsorption. name: (S)-N,N-Dimethyl-1-ferrocenylethylamine, Name is (S)-N,N-Dimethyl-1-ferrocenylethylamine, belongs to chiral-nitrogen-ligands compound, is a common compound. name: (S)-N,N-Dimethyl-1-ferrocenylethylamineCatalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. In an article, authors is Zagorevskii, D. V., once mentioned the new application about name: (S)-N,N-Dimethyl-1-ferrocenylethylamine.

MASS SPECTROMETRY OF ?-COMPLEXES OF TRANSITION METALS XX. DIMETHYLAMINOALKYL DERIVATIVES OF FERROCENE AND CYMANTRENE; THE DETERMINATION OF THE DISTRIBUTION AND THE TOTAL CONTENT OF DEUTERIUM LABEL

The mass spectrometry behaviour of dimethylaminomethyl- and alpha-(dimethyl-amino)ethyl derivatives of cymantrene and ferrocene, their iodine methylates as well as of the deutero analogues of these compounds has been studied.It has been shown that mass spectrometry can be successfully employed for the quantitative determination of the total deuterium content in aminoalkyl derivatives of cymantrene and ferrocene, the distribution of the label between the dimethylaminoalkyl group and the metallocenyl fragment and in case of the dimethylaminomethylferrocene also between thesubstituted and unsubstituted cyclopentadienyl rings.The data on the distribution of the isotopic label were used to ascertain the mechanism of fragmentation of the dimethylaminomethylferrocene under electron impact.

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Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

In homogeneous catalysis, catalysts are in the same phase as the reactants. Chemistry is traditionally divided into organic and inorganic chemistry. Safety of (S)-N,N-Dimethyl-1-ferrocenylethylamine, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. In an article，Which mentioned a new discovery about 31886-57-4

Optically Active Transition-Metal Complexes. 9.1 A General Stereoselective Route to alpha-Chiral (A)-Tricarbonyl(eta6-ethylbenzene)chromium Complexes. Novel Organometallic Phosphine Catalysts for the Asymmetric Hydrovinylation Reaction

Treatment of (R)-[{alpha-(dimethylamino)ethyl}-eta6-benzene]Cr(CO)3 with esters of chloroformic acid leads to stereoselective substitution of the dimethylamino group for a chloro substituent. The reaction can be extended to systems in which the chromium arene complex, after metalation, is diastereoselectively substituted in the ortho position with carbon and silicon electrophiles to generate planar chirality. The chloro group in turn can be replaced stereoselectively for various phosphorus, nitrogen, and oxygen nucleophiles. Both substitution reactions in the benzylic position proceed via retention of configuration. The addition of cyanide is not stereospecific. The phosphine derivatives are efficient catalysts for the enantioselective hydrovinylation of styrene to 3-phenyl-1-butene. X-ray crystal structures establish the absolute configuration of (R)-[(alpha-chloroethyl)eta6-benzene]Cr(CO)3, (R)-[{alpha-(diphenylphosphanyl)ethyl}-alpha6-benzene]Cr(CO) 3, and (pS,S)-[l-(alpha-cyanoethyl)-2-methyl-eta6-benzene]Cr(CO) 3.

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Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis