Category: 14481-08-4

SDS of cas: 14481-08-4. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Enabling the Cross-Coupling of Tertiary Organoboron Nucleophiles through Radical-Mediated Alkyl Transfer. Author is Primer, David N.; Molander, Gary A..

The construction of quaternary centers is a common challenge in the synthesis of complex materials and natural products. Current cross-coupling strategies that can be generalized for setting these centers are sparse and, when known, are typically predicated on the use of reactive organometallic reagents. To address this shortcoming a new, photoredox-Ni dual catalytic strategy for the cross-coupling of tertiary organoboron reagents with aryl halides is reported. In addition to details on the cross-coupling scope and limitations, full screening efforts and mechanistic experiments are communicated.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Fractional sublimation of various metal chelates of dipivaloylmethane》. Authors are Berg, Eugene W.; Herrera, Nicolas M..The article about the compound:Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II)cas:14481-08-4,SMILESS:CC(C)(C1=O[Ni+2]2(O=C(C(C)(C)C)[CH-]1)O=C([CH-]C(C(C)(C)C)=O2)C(C)(C)C)C).Category: esters-buliding-blocks. Through the article, more information about this compound (cas:14481-08-4) is conveyed.

Twenty different metal chelates of dipivaloylmethane were prepared and characterized by m.ps., C-H analyses, and ir and NMR spectral data. The pure chelates were sublimed in the Berg fractional vacuum sublimator and the temperature condensation (sublimation) zones were recorded for each chelate under standardized conditions. The Be chelate was the most volatile and the lanthanide and actinide chelates among the least volatile dipivaloylmethanates. The only volatile alk. earth metal chelates were those of Be and Mg; the Ca, Sr, and Ba chelates were not volatile under the conditions used. Overall the chelates of dipivaloylmethane exhibited volatilities similar to those of the corresponding metal acetylacetonates but less than those of the trifluoroacetylacetonates and the hexafluoroacetylacetonates. The chelates of benzoylacetone, benzoyltrifluoroacetone, and thenoyltrifluoroacetone are less volatile than the corresponding chelates of dipivaloylmethane. The data suggest that some 64 different binary and ternary mixtures of metal dipivaloylmethane chelates can be quant. separated Seven binary and 3 ternary mixtures of the metal chelates were separated satisfactorily.

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Recommanded Product: 14481-08-4. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Investigation of thermolysis mechanism of gas phase of Ni(II) chelates by mass spectrometry.

The volatile products of thermolysis of gas phase (Ni(thd)2, Ni(kaa)2, Ni(ktfaa)2, Ni(hfa)2*2Py) were investigated by the means of mass spectrometry. The effective kinetic parameters of the process were calculated on the basis of the dependence of gas phase thermolysis products composition on temperature The mechanism of thermal decomposition of the complexes is also discussed. It was shown that the initial step of thermal decomposition of the complexes was the opening of chelate cycle. The dependence of vapor pressure on temperature was investigated. The values of thermodn. characteristics of vaporization were calculated

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COA of Formula: C22H38NiO4. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Assignment of the electronic absorption spectra of bis(β-ketoenolate) complexes of copper(II) and nickel(II). Author is Cotton, F. Albert; Wise, John J..

The problem of the relative positions of the M.O. which are mainly metal d orbitals in sq. bis(β-ketoenolato)Cu(II) complexes was investigated by studying the polarizations of single-crystal spectra of Cu(DPM)2 at 25° (DPM represents the anion of 2,2,6,6-tetramethylheptane-3,5-dione, which has the common name dipivaloylmethane, DPM). The orientation of the mols. in the unit cell of this compound permits the complete sorting out of the polarization, something which is not possible in the prototype compound, bis(acetylacetonato)Cu(II). All 4 “”d-d”” transitions occur within a range of a few thousand wavenos. as predicted earlier by our L.C.A.O.-M.O. calculation This result is also in accord with though was not demanded by the E.S.R. data. A similar but less complete study of Ni(DPM)2 indicates that also in that mol. the dxz, dyz, dx2-y2, and dz2 orbitals lie close together, some 20,000 cm.-1 below the dxy orbital. The observed polarizations for Cu(DPM)2 are sufficient to rule out a magnetic dipole mechanism as the main source of intensity, but they do not, in themselves, provide a basis for assignment of the transitions if the intensity mechanism is taken to be a vibronic one. The assignment of the uv spectrum of Cu(DPM)2 is reviewed. Assignments previously proposed by Fackler, et al. are confirmed except that the band at 48,600 cm.-1 is now postulated to be a metal to ligand charge-transfer instead of a π → π* band. 35 references.

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Mazalov, L. N.; Bausk, N. V.; Trubina, S. V.; Erenburg, S. B.; Fedotova, N. E.; Igumenov, I. K. researched the compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II)( cas:14481-08-4 ).SDS of cas: 14481-08-4.They published the article 《Investigation of electronic and spatial structure of Ni(dpm)2 complex in solutions by X-ray absorption spectroscopy with use of synchrotron radiation》 about this compound( cas:14481-08-4 ) in Poverkhnost: Rentgenovskie, Sinkhrotronnye i Neitronnye Issledovaniya. Keywords: electronic structure nickel dipivaloylmethanato complex x ray absorption XANES; adduct nickel dipivaloylmethanate water pyridine ethanol XANES. We’ll tell you more about this compound (cas:14481-08-4).

Studying XANES (X-ray Absorption Near Edge Structure) K-spectra of nickel in the bis(dipivaloylmethanato)nickel as well as in a series of its solutions and adducts was carried out. X-ray spectra were obtained at the station of the Synchrotron Radiation Center in the Institute of Nuclear Physics, Siberian Branch Russian Academy of Sciences. It was shown, that the main absorption maximum of investigated compounds had Rydberg’s character. The fine structure of the main maximum was used to establish a structure of the nearest environment of the metal atom of the complex in solutions and adducts. The involvement of the highest unoccupied metal AOs in the chem. bond was examined

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Category: esters-buliding-blocks. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about NMR studies of heterocycles. VIII. Effect of dipivaloylmethanates of nickel (II), cobalt (II), europium(III) and praseodymium(III) on chemical shifts of some pyrazole derivatives.

The effects produced by 4 shift reagents on the PMR of 1-methylimidazole and seven pyrazole derivatives were determined These results are discussed in the light of their usefulness in differentiating between structural isomers.

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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 14481-08-4, is researched, Molecular C22H38NiO4, about Deposition of mixed conducting oxides thin films on porous ceramic substrates, the main research direction is spray calcination lanthanum nickelate membrane porous ceramic substrate.HPLC of Formula: 14481-08-4.

Dense layers of La nickelate were deposited on flat porous ceramic substrates, by spray pyrolysis for applications of O permeation. As-deposited layers were either amorphous or partially crystalline depending on temperature After annealing treatment at 700° in air, they are constituted of La2NiO4 or LaNiO3 crystalline grains embedded in an amorphous matrix by x-ray diffraction and TEM. In the case of porous ceramic substrates without defects, amorphous layers are gas-tight. Although a formation of small cracks leading to small leaks occurs through annealing treatments, such leaks can be suppressed using a multilayer deposition procedure.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Synthesis and properties of a new ketoiminate derivative of the 2,2,6,6-tetramethylheptane-3,5-dionate ligand to prepare volatile CVD precursors, the main research direction is crystal structure ketoimine copper ketoiminate; ketoimine preparation crystal structure complexation copper nickel; transition metal ketoiminato preparation; thermal decomposition transition metal ketoiminate.Recommanded Product: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II).

The β-ketoimine Me3CC(NH2)CHC(O)CMe3 (1), m.p. = 131°, was synthesized by amination with dry NH3 in the presence of TiCl4. IR and 1H and 13C NMR spectroscopic characterization indicates that the structure of a solution of 1 is the ketone form, and a single-crystal x-ray diffraction study shows that the structure of 1 is the enaminoketone form. The reaction of 1 with Cu(II) and Ni(II) salts in solution gave chelate metal complexes: Cu[Me3CC(NH)CHC(O)CMe3]2 (2), m.p. = 209°, and Ni[Me3CC(NH)CHC(O)CMe3]2 (3), m.p. = 267°. These complexes are volatile and sublime at 180-190° at 5 × 10-3 Torr. An x-ray diffraction study reveals that these metal complexes are monomeric and isostructural in the solid state. In compound 2, the Cu atom has a square planar coordination environment: Cu-O ≈ Cu-N = 1.91 Å, ∠ O-Cu-N = 91.81 Å.

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Application of 14481-08-4. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Structural study of lanthanum nickelate thin films deposited on different single crystal substrates.

Fabrications of La2NiO4+δ thin film layers by liquid-injection metalorganic chem. vapor deposition were tried on different single crystals substrates: (001)Si, (001)MgO, (001)LaAlO3 and (001)SrTiO3. As results of structural characterizations, polycrystalline dendritic layers of La2NiO4+δ tetragonal (or orthorhombic) phase were observed on (001)Si substrates while layers of a perovskite-like cubic structure were observed on the other single crystal substrates. From a high-resolution TEM study of a layer deposited on (001)MgO, such a perovskite-like cubic structure exhibits many planar structural faults likely similar to planes of oxygen vacancies of the La2NiO4+δ orthorhombic structure. A thin intermediate epitaxial layer of NiO phase was also identified. Using a X-ray texture diffractometer, the layer structure on (001)MgO, (001)LaAlO3 and (001)SrTiO3 was confirmed to be of cubic structure with 〈100〉 axes parallel to those of the substrate. The T dependence of the resistivity of a layer deposited on (001)MgO substrate was found to be of a semi-conducting behavior.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Atmospheric pressure chemical vapor deposition and characterization of crystalline InTaO4, InNbO4 and InVO4 coatings.Application of 14481-08-4.

The possibilities to grow crystalline complex InTaO4, InNbO4, and InVO4 coatings as well as single oxide layers In2O3, Ta2O5, Nb2O5, and VOx were investigated using aerosol assisted atm. pressure chem. vapor deposition technique. In(III) and Nb(IV) tetramethylheptanedionates, Ta(V) tetraethoxyacetylacetonate, and V(III) acetylacetonate were used as precursors, monoglyme and toluene as solvents. The influence of deposition conditions and solution composition on elemental and phase compositions of layers was studied. InTaO4 layers containing pure monoclinic InTaO4 phase were obtained ex-situ, i.e., after 800° annealing of layers grown at 500°. Films containing pure orthorhombic InVO4 or monoclinic InNbO4 phase may be prepared using both in-situ (600°) or ex-situ (deposition at 400°, annealing at 800°) approaches. Under optimized deposition conditions and solution compositions, Ni-doped InVO4 and InTaO4 films were also deposited and their photocatalytic activity was tested.

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