Nickel acetate tetrahydrate

Nickel acetate tetrahydrate [6018-89-9] Ni(C2H202) 4H2O, is a green powder which has an acetic acid odor, density 1.74 g/cm. When heated, it loses its water of crystallization and then decomposes to form nickel oxide. Nickel acetate is used as a catalyst intermediate, as an intermediate in the formation of other nickel compounds, as a dye mordant, as a sealer for anodized aluminum, and in nickel electroplating (59). 

Nickel(II), concentration formation constant of chelates, 5 717t Nickel 200, in galvanic series, 7 805t Nickel acetate tetrahydrate, 17 117 Nickel acetylacetonate, 17 117 Nickel alloying process, 17 99-100 Nickel alloy plating, 9 821-822 Nickel alloys, 17 88, 95-104 13 512, 515-525... 

Nickel-based catalysts supported on AI2O3 spheres (12wt% as NiO) were prepared through wet impregnation of support with aqueous solutions of nickel acetate tetrahydrate, Ni(CH3C00)2-4H20 (Carlo Erba). The resulting compound was dried at 120 °C for 12 h and then calcined in air at 950 °C for 1 h. 

NICKEL ACETATE Acetic Acid, nickel (2+) salt, Nickelous acetate, Nickel acetate tetrahydrate NL, II 1 1 0... 

Preparation of the complex. The solution of bis[2-(hydroseleno)ethyl]methyl-amine prepared above is gradually added to a solution of nickel acetate tetrahydrate (4.32 g, 17.4 mmole) in ethanol (100 mL) and stirred for 1 h. The solvent is removed under reduced pressure to obtain a dark mass, which is extracted with benzene (10 x 80 mL). These green extracts are combined, and the benzene is removed under vacuum. The resulting solid is washed with 10 mL of methanol and 50 mL of ether and dried in vacuo to obtain the desired product. Yield = 2.01 g (38.2%). 

Neutral nickel(II) complexes with a number of deprotonated porphyrins have been prepared in most cases by the direct reaction of a nickel salt, usually Ni(ac)2-4H20, with the preformed diacid macrocycle, using media such as DMF, MeC02H or PhCl at refluxing temperature. Recently, the template synthesis of the complex with tetraalkylporphyrins has been reported (Scheme 61).2883 On the other hand the condensation reaction of 1,3,4,7-tetraalkylisoindole and nickel acetate tetrahydrate gives the [Ni(omtbp)] complex (omtbp = octamethyltetrabenzoporphyrinate dianion), 2884... 

A one-necked, 1000-mL, round-bottomed flask (not under argon) is equipped with a Teflon-coated magnetic stirring bar and is charged with nickel acetate tetrahydrate (11.12 g, 44.7 mmol) and sodium thiocyanate (14.48 g, 178.6 mmol). To the solids is added warm (50°C) 95% ethanol (250 mL). The mixture is stirred until all of the solids have dissolved to give a green solution. 

P-1 Ni Boride 77 Nickel acetate tetrahydrate (1.24 g, 5.0 mmol) in 50 ml distilled water is placed in a 125-ml Erlenmeyer flask connected to a mercury bubbler and flushed with nitrogen. To the magnetically stirred solution, 10 ml of a 1.0M solution of sodium borohydride in water is added over 30 s with a syringe. When gas evolution has ceased, a second portion of 5.0 ml of the borohydride solution is added. The aqueous phase is decanted from the granular black solid and the latter washed twice with 50 ml of ethanol, decanting the wash liquid each time. 

P-2 Ni Boride. 78 Nickel acetate tetrahydrate (1.24 g, 5.0 mmol) is dissolved in approximately 40 ml of 95% ethanol in a 125-ml Erlenmeyer flask. This flask is attached to a hydrogenator, which is then flashed with nitrogen. With vigorous stirring, 5.0 ml of 1M sodium borohydride solution in ethanol is injected. When gas evolution from the mixture has ceased, the catalyst is ready for use. 

A reaction vessel was charged with 40 ml methyl alcohol and the product from Step 2 (2.0 g), heated to 50°C, and 40 ml methyl alcohol containing nickel acetate tetrahydrate (1.0 g) added over 30 minutes. Thereafter, 80 ml of water was added, the mixture cooled to 10°C, filtered, and 0.9 g purple solid isolated. 

SYNS ACETIC ACID, NICKEL(+2) SALT, TETRAHYDRATE NTCKEL(II) ACETATE TETRAHYDRATE NICKEL DIACETATE TETRAHYDRATE NICKELOUS ACETATE TETRAHYDRATE... 

NICKEL NITRITE see NDG550 NICKEL NITRITE see NDG550 NICKELOCENE see NDA500 NICKELOUS ACETATE see NCXOOO NICKELOUS ACETATE TETRAHYDRATE see NCX500... 

Isomerization, see also NaphthaIene-2,6-dicarboxylic acid, preparation Aldqximes — Amides Nickel acetate tetrahydrate. Dienes Phenylpotassium. Epoxides Lithium diethylamide. Magnesium bromide etherate. Nonconjuoateo enones p-Tolu iesulfonic acid. Olefins (cis-trans)-. Iodine. Selenium. Olefins (bond migration) N-Lithioethylenediamine. Lithium diethylamide. Potassium l-butoxide. Sodium tetrafluoroboric s d. Thioglycolic acid. Polyenes Sulfur dioxide. 

Organic gels were prepared by polycondensation of resorcinol with formaldehyde in water as a solvent. Three series of carbon samples were prepared one without addition of metal the two others containing nickel and palladium (about 1% weight) respectively. The incorporation of metal was achieved by dissolution of a metal salt nickel acetate (tetrahydrate) and palladium acetate were used. As resorcinol plays the role of nickel complexant, nickel is easily soluble in resorcinol-formaldehyde aqueous solutions. On the contrary, significant amounts of palladium cannot be dissolved without using an additional complexant. Diethylenetrinitrilopentaacetic acid (DTPA) was then added to the solution. No sodium carbonate as polymerisation catalyst was used. In this work, the pH was adjusted to a chosen value by the use of sodium hydroxide (aqueous solution) and measured by a pH-meter. 

Liquid mixture technique can be used to obtain the composite precursor. It consists of the evaporation of a dispersion of YSZ powder in a solution of nickel acetate tetrahydrate and ethanol, followed by calcination at 450°C/5 h to eliminate the organic material [28]. 

CAS 373-02-4 (anhyd.) 6018-89-9 (tetrahydrate) EINECS/ELINCS 206-761-7 Synonyms Acetic acid, nickel (2+) salt Nickel (II) acetate (1 2) Nickel acetate tetrahydrate Nickel diacetate Nickel diacetate tetrahydrate Nickelous acetate Definition Avail, as the tetrahydrate Empirical C4HeNi04 C4HeNi04 4H2O Formula C4H6NI04 (anhyd.), Ni(OOCCH3)2 4H2O (tetrahydrate)... 

Nickel (II) acetate (1 2) Nickel acetate tetrahydrate. See Nickel acetate Nickel acetylmethionate CAS 105883-48-5... 

Nickel acetate tetrahydrate forms coordination complexes with poly(4-vinylpyri-dine) (P4VP) and increases the glass-transition temperature of this amorphous polymer by 102°C when the Ni concentration is 36mol%. The complete concentration dependence of the effect of NF on P4VP s is summarized in Table 6. ... 

Table 6 Effect of Nickel Acetate Tetrahydrate on ffie Glass Transition Temperature of Poly(4-vinylpyridine)...

The crystal structure of undiluted nickel acetate tetrahydrate is pseudo-octahedral. ... 

Nickel(II) and pyridine are classihed as a borderline acid-base pair, whereas lattice waters in the first shell of nickel acetate tetrahydrate are hard bases. 

Figure 4 Molecular model of nickel acetate dihydrate coordinated to two pyridine sidegroups in P4VP illustrating the concept of coordination crosslinks. This model is adopted from the geometry of nickel acetate tetrahydrate, based on its crystal structure. It is proposed that pyridine sidegroups in the polymer displace weak-base waters of hydration in the coordination sphere of the divalent nickel cation.

DichlorDtricarbonylruthenium(ll) Nickel acetate tetrahydrate Cobalt chloride hexahydrate... 

Figure 5 Effect of cobalt chloride hexahydrate, nickel acetate tetrahydrate, and dichlorotricarbonylruthenium(ll) on the glass-transition temperature of poly(4-vinylpyridine). The polymer s molecular weight is 2 X 10 daltons.

Liu et al. applied sol-gel method to prepare nickel oxide active materials for electrochemical capacitors [1], They dried nickel acetate tetrahydrate at 100 °C and stirred it in water for 2 days. The precipitants were separated by centrifugation and put it into water to get pale-green sol. Dipping coated the sol on nickel sheets and annealed in air at 300 °C for 1 h. The diameters of resultant nickel oxide were 3 8 nm and pore sizes were 2 3 nm. The electrochemical capacitors using resultant nickel oxide indicated 50 64 F g capacitance with 1 M KOH aqueous solution. 

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