Category: 13940-83-5

Joergensen, Christian Klixbull; Berthou, Herve published the article 《Photoelectron spectra induced by x-rays of above 600 nonmetallic compounds containing 77 elements》. Keywords: photoelectron spectra inorganic compound; bonding inorganic photoelectron spectra; x ray photoelectron spectra inorganic.They researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Recommanded Product: 13940-83-5. 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.

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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Icelli, Orhan; Erzeneoglu, Salih published the article 《The mass attenuation coefficients in some vanadium and nickel compounds》. Keywords: x ray mass attenuation coefficient vanadium nickel compound.They researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Recommanded Product: 13940-83-5. 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.

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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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Photoelectron spectra induced by x-rays of above 600 nonmetallic compounds containing 77 elements, published in 1972, which mentions a compound: 13940-83-5, Name is Nickel(ii)fluoridetetrahydrate, Molecular F2H8NiO4, Computed Properties of F2H8NiO4.

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.

There is still a lot of research devoted to this compound(SMILES：[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-])Computed Properties of F2H8NiO4, and with the development of science, more effects of this compound(13940-83-5) can be discovered.

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Synthetic Route of F2H8NiO4. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Binder properties of the metal fluoride-hydrogen fluoride-water system. Author is Sychev, M. M.; Sviderskaya, O. I.; Borisova, V. B.; Lazareva, N. V..

The binding properties of the MFm-HF-H2O system were investigated, where M is Na, K, Mg, Co, Ni, or Zr and m an integer. The systems KF-HF-H2O and ZrF4-HF-H2O had the highest yield strength, showing promising tech. utilization.

There is still a lot of research devoted to this compound(SMILES：[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-])Synthetic Route of F2H8NiO4, and with the development of science, more effects of this compound(13940-83-5) can be discovered.

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Application In Synthesis of Nickel(ii)fluoridetetrahydrate. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about A new cathode material of NiF2 for thermal batteries with high specific power. Author is Chang, Qing; Luo, Zeshunji; Fu, Licai; Zhu, Jiajun; Yang, Wulin; Li, Deyi; Zhou, Lingping.

Transition metal halides, especially fluorides, are promising candidates used as cathode materials for primary batteries, thanks to their attractive electrochem. properties such as high conversion potential as well as extraordinary specific capacity. The intrinsic thermal stability stemming from the characteristic ionic bond, M-F, also enables them to be applied in some severe conditions. Herein, the authors study the discharge performance of NiF2 under large c.d. (0.1 A cm-2, 0.2 A cm-2 and 0.5 A cm-2), together with extremely high temperature of 520°, 550° and 580°. It can exhibit excellent electrochem. properties with the maximum specific power up to 16.2 kW kg-1 at c.d. of 0.5 A cm-2 and temperature of 550°, at cutoff voltage of 2 V (80% of the peak voltage). When the c.d. is controlled at 0.1 A cm-2, the specific power can also reach at 3.5 kW kg-1 with other parameters as the same. Afterwards, XRD and XPS are conducted to further evidence the discharge mechanism of this process, confirming it as NiF2 + 2Li → Ni + 2LiF. Based on them, probably this work will afford insights into alternatives of cathode materials in the area of high specific power thermal batteries.

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Application of 13940-83-5. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Mechanism of film formation on nickel anodes in a molten NH4F.2HF. Author is Tasaka, A.; Tsukuda, Y.; Yamada, S.; Matsushita, K.; Kohmura, A.; Muramatsu, N.; Takebayashi, H.; Mimaki, T..

The mechanism of film formation on the Ni anode in a well dehydrated melt of NH4F.2HF was studied at 1000C. The potentiodynamic and potentiostatic polarization behaviors of the Ni anode were studied to elucidate the anodic processes. The oxidized layer was composed of NiF2 with a small amount of nickel oxides such as NiO and Ni2O3 or oxyfluorides having plural oxidation states and a highly oxidized nickel fluoride formed on the Ni anode polarized at potentials >4.5 V vs. H2 and it grew thicker through the repetition of the alternate formation and degradation with the time of electrolysis. The composition and the thickness of the oxidized layer may reflect on the c.d. on the nickel anode under polarization.

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Safety of Nickel(ii)fluoridetetrahydrate. 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: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about A comparison of different spectrometers and charge corrections used in x-ray photoelectron spectroscopy.

The binding energies of the most intense ESCA lines of 16 substances were measured using the following spectrometers: 2 different VIEE 15, an ESCA 3, in part a McPherson, an AEI ES 100 and a Hewlett-Packard. When taking throughout a charge correction value C 1s = 285.0 eV, the instruments provide the same results with an error of ±0.3 eV, apart from a few exceptions. A comparison between the C 1s correction and the method of evaporation of thin Au layers shows good agreement when setting Au 4f = 83.8 eV. In this case, it is important to avoid too much Au and any surface reactions.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Thermal decomposition of nickel and zinc fluoride tetrahydrates, the main research direction is decomposition nickel fluoride hydrate; zinc fluoride hydrate decomposition.SDS of cas: 13940-83-5.

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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Hatakeyama, Takuji; Hashimoto, Sigma; Ishizuka, Kentaro; Nakamura, Masaharu published the article 《Highly Selective Biaryl Cross-Coupling Reactions between Aryl Halides and Aryl Grignard Reagents: A New Catalyst Combination of N-Heterocyclic Carbenes and Iron, Cobalt, and Nickel Fluorides》. Keywords: unsym biaryl preparation; cross coupling reaction aryl Grignard reagent aryl heteroaryl halide; nitrogen heterocyclic carbene iron fluoride catalyst cross coupling reaction.They researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).COA of Formula: F2H8NiO4. 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.

Combinations of N-heterocyclic carbenes (NHCs) and fluoride salts of the iron-group metals (Fe, Co, and Ni) have been shown to be excellent catalysts for the cross-coupling reactions of aryl Grignard reagents (Ar1MgBr) with aryl and heteroaryl halides (Ar2X) to give unsym. biaryls (Ar1-Ar2). Iron fluorides in combination with SIPr (1,3-bis(2,6-diisopropylphenyl)imidazolinium hydrochloride), a saturated NHC ligand, catalyze the biaryl cross-coupling between various aryl chlorides and aryl Grignard reagents in high yield and high selectivity. On the other hand, cobalt and nickel fluorides in combination with IPr (1,3-bis(2,6-diisopropylphenyl)imidazolium hydrochloride), an unsaturated NHC ligand, exhibit interesting complementary reactivity in the coupling of aryl bromides or iodides; in contrast, with these substrates the iron catalysts show a lower selectivity. The formation of homocoupling byproducts is suppressed markedly to less than 5% in most cases by choosing the appropriate metal fluoride/NHC combination. The present catalyst combinations offer several synthetic advantages over existing methods: practical synthesis of a broad range of unsym. biaryls without the use of palladium catalysts and phosphine ligands. On the basis of stoichiometric control experiments and theor. studies, the origin of the unique catalytic effect of the fluoride counterion can be ascribed to the formation of a higher-valent heteroleptic metalate [Ar1MF2]MgBr as the key intermediate in our proposed catalytic cycle. First, stoichiometric control experiments revealed the stark differences in chem. reactivity between the metal fluorides and metal chlorides. Second, DFT calculations indicate that the initial reduction of di- or trivalent metal fluoride in the wake of transmetalation with PhMgCl is energetically unfavorable and that formation of a divalent heteroleptic metalate complex, [PhMF2]MgCl (M = Fe, Co, Ni), is dominant in the metal fluoride system. The heteroleptic ate-complex serves as a key reactive intermediate, which undergoes oxidative addition with PhCl and releases the biaryl cross-coupling product Ph-Ph with reasonable energy barriers. The present cross-coupling reaction catalyzed by iron-group metal fluorides and an NHC ligand provides a highly selective and practical method for the synthesis of unsym. biaryls as well as the opportunity to gain new mechanistic insights into the metal-catalyzed cross-coupling reactions.

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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: 13940-83-5, is researched, Molecular F2H8NiO4, about Highly Selective Biaryl Cross-Coupling Reactions between Aryl Halides and Aryl Grignard Reagents: A New Catalyst Combination of N-Heterocyclic Carbenes and Iron, Cobalt, and Nickel Fluorides, the main research direction is unsym biaryl preparation; cross coupling reaction aryl Grignard reagent aryl heteroaryl halide; nitrogen heterocyclic carbene iron fluoride catalyst cross coupling reaction.COA of Formula: F2H8NiO4.

Combinations of N-heterocyclic carbenes (NHCs) and fluoride salts of the iron-group metals (Fe, Co, and Ni) have been shown to be excellent catalysts for the cross-coupling reactions of aryl Grignard reagents (Ar1MgBr) with aryl and heteroaryl halides (Ar2X) to give unsym. biaryls (Ar1-Ar2). Iron fluorides in combination with SIPr (1,3-bis(2,6-diisopropylphenyl)imidazolinium hydrochloride), a saturated NHC ligand, catalyze the biaryl cross-coupling between various aryl chlorides and aryl Grignard reagents in high yield and high selectivity. On the other hand, cobalt and nickel fluorides in combination with IPr (1,3-bis(2,6-diisopropylphenyl)imidazolium hydrochloride), an unsaturated NHC ligand, exhibit interesting complementary reactivity in the coupling of aryl bromides or iodides; in contrast, with these substrates the iron catalysts show a lower selectivity. The formation of homocoupling byproducts is suppressed markedly to less than 5% in most cases by choosing the appropriate metal fluoride/NHC combination. The present catalyst combinations offer several synthetic advantages over existing methods: practical synthesis of a broad range of unsym. biaryls without the use of palladium catalysts and phosphine ligands. On the basis of stoichiometric control experiments and theor. studies, the origin of the unique catalytic effect of the fluoride counterion can be ascribed to the formation of a higher-valent heteroleptic metalate [Ar1MF2]MgBr as the key intermediate in our proposed catalytic cycle. First, stoichiometric control experiments revealed the stark differences in chem. reactivity between the metal fluorides and metal chlorides. Second, DFT calculations indicate that the initial reduction of di- or trivalent metal fluoride in the wake of transmetalation with PhMgCl is energetically unfavorable and that formation of a divalent heteroleptic metalate complex, [PhMF2]MgCl (M = Fe, Co, Ni), is dominant in the metal fluoride system. The heteroleptic ate-complex serves as a key reactive intermediate, which undergoes oxidative addition with PhCl and releases the biaryl cross-coupling product Ph-Ph with reasonable energy barriers. The present cross-coupling reaction catalyzed by iron-group metal fluorides and an NHC ligand provides a highly selective and practical method for the synthesis of unsym. biaryls as well as the opportunity to gain new mechanistic insights into the metal-catalyzed cross-coupling reactions.

From this literature《Highly Selective Biaryl Cross-Coupling Reactions between Aryl Halides and Aryl Grignard Reagents: A New Catalyst Combination of N-Heterocyclic Carbenes and Iron, Cobalt, and Nickel Fluorides》,we know some information about this compound(13940-83-5)COA of Formula: F2H8NiO4, but this is not all information, there are many literatures related to this compound(13940-83-5).

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