83864-14-6Relevant articles and documents
Thermal and structural studies of amide complexes of transition metal(II) chlorides. II: Kinetics
Nelwamondo, Aubrey N.,Eve, Desmond J.,Brown, Michael E.
, p. 177 - 186 (1998)
The possibility of correlating the kinetic parameters for the thermal decompositions of a series of NiLCl2 complexes, where L=N-methylformamide (nmf), N-methylacetamide (nma) or acetamide (aa), with the nature (steric and electronic effects) of the coordinated ligands and the strengths of the metal-ligand bonds has been explored. The rates of removal of L in single endothermic processes were measured using isothermal TG in nitrogen. Plots of α against time are deceleratory and are best described by either the R2 or R3 expressions. An empirical (B2) expression: vr=1-(kt)b, was introduced to give the best description of the results for the Ni(nma)Cl2 complex. Comparable Ea values were obtained using various isothermal and non-isothermal methods of analysis. Ea values for the NiLCl2 system (calculated using the R3 model) generally increased with an increase in basicity of the amide ligand:N-methylformamide~acetamidea values were found to be lower than the corresponding decomposition enthalpies (ΔHL), indicating that cleavage of the nickel-amide bond could be the rate-controlling event. The order of Ea values was found not to coincide with that of the ΔHL values. Extrapolated onset temperatures (Te) and temperatures at maximum decomposition rate (Tmax) were determined from TG and DSC curves. No simple correlation was found between Ea, ΔHL, Te or Tmax and the spectral properties of the complexes.
Jones, H. O.,Tasker, H. S.
, p. 1904 - 1909 (1909)
Covalent embedding of Ni2+/Fe3+ cyanometallate structures in silica by sol-gel processing
Felbermair, Elisabeth,Sidorenko, Andrey,Paschen, Silke,Akbarzadeh, Johanna,Peterlik, Herwig,Schubert, Ulrich
, p. 9212 - 9215 (2014)
Compound [Ni(AEAPTS)2]3[Fe(CN)6] 2 (AEAPTS=N-(2-aminoethyl)-3-aminopropyltrimethoxysilane), in which Ni2+ and Fe3+ ions are ferromagnetically coupled through cyano bridges, was prepared. Sol-gel processing of the AEAPTS derivative resulted in incorporation of the cyanometallate in silica. The obtained material is magnetically ordered below 22 K with an effective magnetic moment μeff of 4.46 μB at room temperature, a maximum of 8.60 μB at approximately 15 K and a narrow hysteresis at 2 K, with a saturation remanence of about 300 emu mol-1 and a coercitivity of 0.03 T. Magnetic crowd: [Ni(AEAPTS)2]3[Fe(CN) 6]2 (AEAPTS = N-(2-aminoethyl)-3- aminopropyltrimethoxysilane) was covalently tethered to silica gel. The obtained material is magnetically ordered below 22 K with an effective magnetic moment μeff of 4.46 μB at room temperature, a maximum of 8.60 μB at approximately 15 K, and a narrow hysteresis at 2 K (saturation remanence≈300 emu mol-1, coercitivity 0.03 T).
Busey, R. H.,Giauque, W. F.
, p. 1791 - 1794 (1953)
An analysis of the electronic spectra of some nickel(II) halide amine complexes
Lever,Nelson,Shepherd
, p. 810 - 813 (1965)
The diffuse reflectance spectra (30,000-10,000 cm.-1) of 28 six-coordinate nickel(II) complexes of microsymmetry NiN2X (N = amine, X = Cl or Br) are analyzed in terms of octahedral stereochemistry. It is shown that the rule of averag
Standard enthalpy of formation of Cl2(cr) as determined by solution-reaction calorimetry
Kuriyama, Nobuhiro,Sakiyama, Minoru
, p. 729 - 734 (1988)
The standard molar enthalpy at 298.15 K was determined by solution-reaction calorimetry for the reaction: NiCl2(cr) + 6NH4Cl(cr) = Cl2(cr) + 6HCl(g).From the standard molar enthalpy of reaction, the standard molar enthalpy of formation of Cl2(cr) was derived.The derived value is in reasonably good agreement with a value given in the NBS tables of chemical thermodynamic properties, which was based on the analysis of the equilibria: NiCl2(cr) + NH3(g) = Cl2(cr), Cl2(cr) + NH3(g) = Cl2(cr), and Cl2(cr) + 4NH3(g) = Cl2(cr).
X-ray study of Kr and Xe adsorbed on the basal plane of nickel chloride
Morishige, K.,Hanayama, M.,Kittaka, S.
, p. 451 - 456 (1988)
X-ray scattering has been used to investigate the structure and phase transitions of Xe and Kr films adsorbed on the basal plane of NiCl2.The x-ray scattering measurements were carried out both as a function of temperature at fixed coverage and as a function of coverage at fixed temperature in the monolayer and bilayer coverage regimes.The results indicate that both the monolayers of Xe and Kr adsorbed on the basal plane of NiCl2 form a 2D solid of the simple triangular structure incommensurate with the substrate and 2D melting is first order in the incommensurate solid of Xe but continuous in that of Kr.With tha addition of the second-layers atoms the interparticle distance of the adsorbed atoms reduces and the crystallinity of the incommensurate solid improves.
Anodic Dissolution of Nickel Sulfide in Acidic Cu(II) Electrolytes
Natorkhin
, p. 51 - 54 (2001)
The effect of ligands on the anodic dissolution of NiS in copper-containing acidic electrolytes was studied.
Three new O,N-coordinated Ni(II) complexes: Syntheses, crystal structures, and MOCVD applications
Dorovskikh, Svetlana I.,Alexeyev, Aleksey V.,Kuratieva, Natalia V.,Basova, Tamara V.,Kiselev, Vitaly G.,Sheludyakova, Liliya A.,Shubin, Yury V.,Morozova, Natalia B.,Igumenov, Igor K.
, p. 122 - 130 (2013)
Three new O,N-coordinated nickel (II) complexes, namely, Ni(dmpda(acac)2) (1), Ni(pda)(acac)2 (2) and Ni(pda)(tfac)2 (3) have been synthesized ((dmpda(acac)2 e N,N0-(2,2-dimethyl-1,3-diaminopropane)-bis-( 2,4-pentanedioniminoato(2-), acac e 2,4-pentanedionato, pda e 1,3-diaminopropane, tfac e 1,1,1-trifluoroacetylacetonato and tested as new precursors for metaleorganic chemical vapor deposition (MOCVD). The structures of 1e3 were determined by single-crystal X-ray diffraction (XRD) and further characterized by IR and Raman spectroscopies. All three compounds crystallize in the triclinic space group P1 with unit cell parameters of a = 9.0294(6), b = 9.2879(6), c = 10.4065(6)γA, a = 74.855(3), b = 68.717(3), g = 78.708(3) for 1; a = 7.6947(2), b = 10.3087(3), c = 10.7144(3)A, a = 101.784(1), b = 95.367 (1), g = 106.134(1) for 2; and a = 7.8931(5), b = 10.8803(8), c = 10.9438(7)A, a = 103.283(2), b = 97.070(3), g = 103.050(2) for 3. The density functional theory (B3LYP) quantum chemical calculations have been used for detailed assignment of all intense bands in the vibrational spectra of the compounds studied. Thermal gravimetric analysis (TG/DTA) has shown that the species 1 and 3 sublime almost without decomposition, and 2 decomposes to some extent. MOCVD test experiments were carried out at low pressure (10 Torr) using 1 and 3 as precursors on Ta/Si substrates. The films have been characterized by X-ray powder diffraction, scanning electron microscopy, and energy dispersive spectroscopy were found to be primarily composed either of fcc-Ni or Ni3C phases. The phase composition of the films strongly depends on the MOCVD conditions. Crown Copyright.
Nickel-Catalyzed Coupling of Arylzinc Halides with Thioesters
Gehrtz, Paul H.,Kathe, Prasad,Fleischer, Ivana
supporting information, p. 8774 - 8778 (2018/06/26)
The Pd-catalyzed Fukuyama reaction of thioesters with organozinc reagents is a mild, functional-group-tolerant method for acylation chemistry. Its Ni-catalyzed variant might be a sustainable alternative to expensive catalytic Pd sources. We investigated the reaction of S-ethyl thioesters with aryl zinc halides with hetero- and homotopic Ni precatalysts and several ligands. The results show that both homo- and heterotopic species may contribute to catalysis. The substrate scope using an operationally homogeneous defined Ni complex was established. Acyl radicals are postulated as short-lived intermediates.
Preparation method of battery grade nickel acetate
-
Paragraph 0032; 0034, (2017/08/29)
The invention relates to a preparation method of battery grade nickel acetate, and aims at providing a preparation method of battery grade nickel acetate, which is simple in production principle and wide in raw material source and facilitates industrial production. The preparation method of the battery grade nickel acetate comprises the following steps: metallic nickel powder and an acid copper chloride solution react, impurity removal and evaporation are carried out, and NiCl2 is obtained; NiCl2 is mixed with a sodium hydroxide solution fully, after filtration, Ni(OH)2 is obtained, nickelous hydroxide is washed and then is acidified by acetic acid, and nickel acetate is generated finally. The nickel acetate prepared by the preparation method is high in purity. The preparation method is applied to the technical field of chemical production.
Nazarov cyclization of divinyl and arylvinyl epoxides: Application in the synthesis of resveratrol-based natural products
Sudhakar, Gangarajula,Satish, Kovela
supporting information, p. 6475 - 6480 (2015/04/22)
New variation in the Nazarov cyclization has been developed by preparing divinyl and arylvinyl epoxides as pentadienyl cation precursors for the first time. Highly substituted cyclopentadienes, hydrindienes, and indenes were synthesized to demonstrate the compatibility of this reaction with substrates bearing a variety of substitutions and having different types of epoxides. Application of this method in the synthesis of resveratrol-based natural products was also demonstrated.
