Category: 13940-83-5

Joergensen, Christian Klixbull; Berthou, Herve published an article about the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5,SMILESS:[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-] ).HPLC of Formula: 13940-83-5. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:13940-83-5) through the article.

The photoelectron spectra induced by Al (1486.6 eV) or Mg (1253.6 eV) x-ray excitation of >600 compounds indicate that the chem. shift (dI) of the ionization energy (I) of the inner shells is not only dependent on the oxidation state of a given element, but also on the ligands. Even for a fixed oxidation state, dI was 2-8 eV in a comparative study of all elements which are neither noble gases nor strongly radioactive. However, this conclusion is, to some extent, modified by reproducible pos. potentials on nonconducting samples which were measured at 1-4V in typical cases and compared with the theory for almost ionic cubic crystals and with experiments with mixtures of nonconducting powd. MgF2, BaSO4, and ThF4 and metals such as Au, Tl2O3, and CuS. The widths and highly varying intensities of photoelectron signals are theor. discussed. The d and f shells of transition and post-transition group atoms give relatively intense signals even for I 8-30 eV since the 1486.6-eV photons most readily ionize shells with small average radii. Interesting relations can be established with electron transfer spectra and optical electronegativities. Special satellites occur in Cu(II), La(III) and other lanthanide compounds The adaptation of the electronic d. of the neighbor atoms in the ionized system contribute to dI which cannot be explained exclusively on the basis of fractional at. charges and the Madelung potential.

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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: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Synthesis of NiF2 and NiF2·4H2O Nanoparticles by Microemulsion and Their Self-Assembly.Product Details of 13940-83-5.

Superstructures or self-assembled nanoparticles open the developmentof new materials with improved and/or novel properties. Here, we presentnickel fluoride (NiF2) self-assemblies by successive preparatory methods. Originally, the self-assemblies were obtained by exploiting the water-in-oil microemulsion technique as a result of auto-organization of hydrated NiF2 (NiF2·4H2O) nanoparticles. The nanostructuration of NiF2·4H2O nanoparticles was confirmed by X-ray diffraction (XRD) andtransmission electron microscopy (TEM) data. The size and shape of NiF2·4H2O nanoparticles and their subsequent self-assemblies varied slightly as a function of water-to-surfactant and water-to-oil ratios. SEM (SEM) and TEM characterizations revealed that the nanoparticles are organized intoa succession of self-assemblies: from individual nanoparticles assembled into layers to truncated bipyramids, which further auto-organized them selves into almond-shaped superstructures. Anhydrous NiF2 was achieved by heating NiF2·4H2O self-assembliesunder the dynamic flow of mol. fluorine (F2) at amoderate temperature (350°C). Preservation of self-assembliesduring the transformation from NiF2·4H2O to NiF2 is successfully achieved. The obtained materialshave a sp. surface area (SSA) of about 30 m2/g, morethan 60% of that of bulk NiF2. The lithium-ion (Li+) storage capacities and the mechanism of the nanostructuredsamples were tested and compared with the bulk material by galvanostaticcycling and X-ray absorption spectroscopy (XAS). The nanostructured samples show higher capacities (~650 mAh/g) than the theor.(554 mAh/g) first discharge capacity due to the concomitant redox conversion mechanism of NiF2 and solid-electrolyte interphase (SEI) formation. The nanostructuration by self-assembly appears to pos. influence the lithium diffusion in comparisonto the bulk material. Finally, the magnetic properties of nanostructured NiF2·xH2O (x = 0 or 4) have been measured and appear to be very similar to those of the corresponding bulk materials, without any visible size reduction effect. The hydrated samples NiF2·4H2O show an antiferromagnetic ordering at TN = 3.8 K, whereas the dehydrated ones (NiF2) present acanted antiferromagnetic ordering at TN = 74 K.

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Easwaran, K. R. K.; Srinivasan, Ramaswami published an article about the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5,SMILESS:[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-] ).Quality Control of Nickel(ii)fluoridetetrahydrate. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:13940-83-5) through the article.

N.M.R. studies of proton and F nuclei are reported in a series of compounds MF2.4H2O, where M is Fe, Co, Ni, and Zn. The spectra of the 3 paramagnetic salts were different from those of the diamagnetic ZnF2.4H2O. Proton resonance studies of the paramagnetic members have shown marked changes in line width on cooling from room temperature to 90°K. The 19F resonance in the paramagnetic salts in polycrystalline from have shown large shifts which were temperature dependent. The results are discussed in terms of the hyperfine fields owing to the unpaired electrons of the paramagnetic ions.

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Baydas, E.; Sahin, Y.; Buyukkasap, E. published an article about the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5,SMILESS:[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-] ).Electric Literature of F2H8NiO4. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:13940-83-5) through the article.

The photon induced K x-ray fluorescence cross sections (σKα, σKβ) for Co, Ni and Cu in F and Cl compounds were studied. Measurements were carried out at 10 different energies in the interval 8.14-16.89 keV by using secondary excitation method. K x-rays emitted by samples were counted by a Si(Li) detector with resolution 160 eV at 5.9 keV. K x-ray fluorescence cross sections (σKα, σKβ) for Co, Ni and Cu in F and Cl compounds decrease with increasing excitation energy. Particularly, K x-ray fluorescence cross sections (σKα, σKβ) for F compounds of this element are higher than the theor. values and those of Cl compounds of this element. Obtained values were compared with theor. values of pure elements.

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Related Products of 13940-83-5. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Influence of HF2- geometry on magnetic interactions elucidated from polymorphs of the metal-organic framework [Ni(HF2)(pyz)2]PF6 (pyz = pyrazine). Author is Manson, Jamie L.; Carreiro, Kimberly E.; Lapidus, Saul H.; Stephens, Peter W.; Goddard, Paul A.; Del Sesto, Rico E.; Bendix, Jesper; Ghannadzadeh, Saman; Franke, Isabel; Singleton, John; Lancaster, Tom; Moeller, Johannes S.; Baker, Peter J.; Pratt, Francis L.; Blundell, Stephen J.; Kang, Jinhee; Lee, Changhoon; Whangbo, Myung-Hwan.

A tetragonal polymorph of [Ni(HF2)(pyz)2]PF6 (designated β) is isomorphic to its SbF6-congener at 295 K and features linear Ni-FHF-Ni pillars. Enhancements in the spin exchange (JFHF = 7.7 K), Neel temperature (TN = 7 K), and critical field (Bc = 24 T) were found relative to monoclinic α-PF6. DFT reveals that the HF2- bridges are significantly better mediators of magnetic exchange than pyz (Jpyz), where JFHF ≈ 3Jpyz, thus leading to quasi-1D behavior. Spin d. resides on all atoms of the HF2- bridge whereas N-donor atoms of the pyz ring bear most of the d.

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Singh, Tejbir; Kaur, Paramjeet; Singh, Parjit S. published an article about the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5,SMILESS:[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-] ).Synthetic Route of F2H8NiO4. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:13940-83-5) through the article.

Mass attenuation coefficients (μm), effective at. numbers (Zeff) and electron densities (Nel) of some V compounds V2O3, VO2, VF3, VF4, NH4VO3 and Ni compounds NiF2, NiCl2, NiCl2.6H2O, Ni(ClO4)2.6H2O, NiF2.4H2O have been computed over a wide energy region from 10 keV to 100 GeV. In all the parameters, a similar trend is observed All the parameters initially possesses maximum values, which decreases very rapidly upto 100 keV, then becomes almost constant upto 3 MeV and with the further increase in the incident photon energy beyond 3 MeV, values of all the parameters also increase which may be due to dominance of different partial photon interaction process in different energy regions.

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Tasaka, Akimasa; Osada, Toshinori; Kawagoe, Tomoo; Kobayashi, Megumi; Takamuku, Atsushi; Ozasa, Kohtaro; Yachi, Tomonori; Ichitani, Toshiyuki; Morikawa, Katsuhiko published the article 《Effect of metal fluorides in the electrolyte on the electrolytic production of NF3》. Keywords: nitrogen trifluoride electrolytic production fluoride effect.They researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Application In Synthesis of Nickel(ii)fluoridetetrahydrate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:13940-83-5) here.

Electrolysis of the melts of NH4F·2HF with and without metal fluorides such as LiF, NaF, KF, CsF, MgF2, and AlF3 was conducted with a nickel anode. The mixed gas composed of NF3 and N2 with a small amount of N2F4, N2F2, N2O, and O2 was liberated at the anode by electrolysis at 25 mA/cm2 and at 120°. The addition of LiF into the melt was most effective for increasing the NF3 current efficiency and for minimizing the consumption of nickel anode. In contrast, KF in the melt decreased the current efficiency for NF3 and other constituents in the anode gas as well as hydrogen generated at the cathode. It also stimulated the consumption of Ni anode. The concentration of nickel ion in the molten KF-NH4F-HF system was low compared with that in the melts of NH4F·2HF with and without alkali metal fluorides such as LiF and CsF because KNiF3 was deposited on the cathode and the cell bottom. The SEM observation and the XPS and XRD analyses revealed that the oxidized layer formed on nickel in molten NH4F·2HF with and without LiF, CsF, and 0.3 mol% NaF was composed of NiF2 with a small amount of Ni oxides of divalent and trivalent states and highly oxidized nickel fluorides. The surface layer formed on nickel in molten NH4F·2HF with 6.7 mol% NaF was mainly composed of NiF2 and NaNiF3. On the other hand, the oxidized layer in the melt containing KF was composed of only KNiF3, and was very brittle. Therefore, it is concluded that KF is detrimental to the nickel anode, depending on the composition of molten fluoride.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Thermal decomposition of hydrated salts of copper and nickel. VII. Fluoride, chloride, and iodide of nickel》. Authors are My, Le Van; Perinet, Guy; Bianco, Pierre.The article about the compound:Nickel(ii)fluoridetetrahydratecas:13940-83-5,SMILESS:[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-]).Electric Literature of F2H8NiO4. Through the article, more information about this compound (cas:13940-83-5) is conveyed.

cf. preceding abstract The F-, Cl-, and I- of Ni were heated from ambient temperature to 750° at 5°/hr. Pyrolysis in air led to the formation of oxides. The dehydration of I- gave an anhydrous salt directly, but the removal of the last mol. of H2O was difficult in all cases.

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Related Products of 13940-83-5. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about The mass attenuation coefficients in some vanadium and nickel compounds. Author is Icelli, Orhan; Erzeneoglu, Salih.

The mass attenuation coefficients for V2O3, VO2, VF3, NH4VO3, VF4, NiF2, NiCl2, NiCl2.H2O, NiF2.4H2O, NiCl2.6H2O, Ni(ClO4)2.6H2O were measured at x-ray energies 15.746-40.930 keV using a Si(Li) detector. The measured values are compared with the theor. ones calculated using WinXcom.

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Recommanded Product: Nickel(ii)fluoridetetrahydrate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Thermal decomposition of nickel and zinc fluoride tetrahydrates. Author is Lange, Bruce A.; Haendler, Helmut M..

NiF2.4H2O decomposes in 3 steps when heated. In dry air or Ar atm. NiF2.H2O is formed at ∼125°, but H2O and HF are lost and NiOHF.3NiF2 is formed at ∼225°. NiOHF.3NiF2 loses another mol. of HF at ∼430° and the final product is a mixture of NiF2 and NiO in 3:1 mole ratio. In the presence of H2O, the final product is NiO, the other steps being the same. ZnF2.4H2O loses H2O at >75° to give anhydrous ZnF2.

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