Nickel chloride, anhydrous

Nickel chloride (6H2O) [7791-20-0 (6H2O) 69098-15-3 (xHiO) 7718-54-9 (anhydr)] M 237.7. Crystd from dilute HCl. 

Anhydrous nickel chloride, 17 110 Anhydrous nickel fluoride, 17 110 Anhydrous nickel halides, properties of, 17 HOt... 

Anhydrous nickel carbonate is produced as a precipitate when calcium carbonate is heated with a solution of nickel chloride in a sealed tube at 150°C. Alternatively, treating nickel powder with ammonia and carbon dioxide followed by boding off ammonia yields pure carbonate. 

Anhydrous nickel chloride is prepared by burning nickel in chlorine gas. Some other methods of preparation involve... 

When ammonia gas is passed over anhydrous nickel chloride the product is an ammoniate, hexamine nickel chloride, NiCb GNHs. Ammoniate also can be prepared in solution by dissolving nickel chloride hexahydrate in an aqueous solution of ammonia. 

Elemental composition (for anhydrous NiCb) Ni 45.30%, Cl 54.70% Percent composition of NiCl2 6H20 Ni 24.69%, Cl 29.83%, H2O 45.48%. Nickel may be analyzed in an aqueous solution of salt by various instrumental techniques (See Nickel). Chloride ion in the aqueous solution may be determined by titration with silver nitrate using potassium chromate indicator or preferably by ion-chromatography. The solutions must be appropriately diluted for all analyses. 

Synonym Neatsfoot Oil Necatorina Nechexane Neutral Ahhonium Pluoride Neutral Anhydrous Calcium Hypochlorite Neutral Lead Acetate Neutral Nicotine Sulfate Neutral Potassium Chromate Neutral Sodium Chromatetanhydrous Neutral Verdigris Nickel Acetate Nickel Acetate Tetrahyorate Nickel Ammonium Sulfate Nickel Ammonium Sulfate Hexahydrate Nickel Bromide Nickel Bromide Trihydrate Nickel Carbonyl Nickel Chloride Nickel Chloride Nickel Cyanide Nickel Iiu Fluoborate Nickel Fluoroborate Solution Nickel Fluoroborate Nickel Formate Nickel Formate Dihyorate Nickel Nitrate Nickel Nitrate Hexahydrate Nickel Sulfate Nickel Tetracarbokyl Nickelous Acetate Nickelous Sulfate Nicotine Nicotine Sulfate Nifos Nitralin Nitram O-Nitraniline P-Nitraniline Nitric Acid Nitric Acid, Aluminum Salt Nitric Acid, Iron (111) Salt Compound Name Oil Neatsfoot Carbon Tetrachloride Neohexane Ammonium Fluoride Calcium Hypochlorite Lead Acetate Nicotine Sulfate Potassium Chromate Sodium Chromate Copper Acetate Nickel Acetate Nickel Acetate Nickel Ammonium Sulfate Nickel Ammonium Sulfate Nickel Bromide Nickel Bromide Nickel Carbonyl Nickel Chloride Nickel Chloride Nickel Cyanide Nickel Fluoroborate Nickel Fluoroborate Nickel Fluoroborate Nickel Formate Nickel Formate Nickel Nitrate Nickel Nitrate Nickel Sulfate Nickel Carbonyl Nickel Acetate Nickel Sulfate Nicotine Nicotine Sulfate Tetraethyl Pyrophosphate Nitralin Ammonium Nitrate 2-Nitroaniline 4-Nitroaniline Nitric Acid Aluminum Nitrate Ferric Nitrate... 

Materials. Imidazole, benzimidazole, and glucosamine hydrochloride were obtained from the Eastman Kodak Co., and used without further purification, after drying for several days over anhydrous calcium chloride. Stock solutions of nickel nitrate and nickel chloride were analyzed by precipitation with dimethyl-glyoxime. Stock solutions of cadmium nitrate were analyzed gravimetrically by conversion to cadmium sulfate. 

Preparation of Anhydrous Cobalt (Nickel) Chloride in an Ethanol Solution. For the procedure of running the experiment, see supplementary experiment 2 on p. 238. 

Indolines 41, 42 are dehydrogenated by anhydrous copper chloride in pyridine to the corresponding indoles 41a, 42a [33, 35] with yields of up to 40%. The production of 5-(diethoxyphosphoryl)indoline (43) and 5-(dicthoxyphosphoryl[indole (43a) from 5-bromoindoline (5-bromoindole) and trialkyl phosphites by the Arbuzov reaction, catalyzed by nickel chloride has been described [35] ... 

To a stirred solution of methyl magnesium iodide (748 mg, 4.5 mmol) in ether (15 ml), diphenyliodonium bromide (722 mg, 2 mmol) and anhydrous nickel chloride (15 mg) were added all at once at room temperature, under nitrogen. The mixture was stirred for 20 min, unreacted methyl magnesium iodide was decomposed by addition of water, the reaction mixture was neutralized with 10% hydrochloric acid, washed with water, and the ether layer dried and concentrated. The residue was chromatographed (silica, petroleum ether) to give the pure biaryls. 

When aqueous solutions of sodium arenetellurolatcs and cyclopentadienylbis[tributyl-phosphane]nickel chloride were mixed at 20° under an atmosphere of nitrogen, oils were formed immediately. The oils were extracted with benzene, the extracts dried over anhydrous calcium chloride, and the dried extracts evaporated. The residues were recrystallizcd from pentane3. The complexes were obtained in yields ranging from 76 to 88%. 

Cobalt chloride readily dissolves in ether saturated with hydrogen chloride, yielding a blue solution. Nickel chloride, on the contrary, is insoluble, being precipitated as the yellow, anhydrous salt. The separation of nickel from cobalt chloride may thus be effected as follows ... 

Nickel Monoselenide or Nickel Selenide, NiSe, results in regular double tetrahedra when nickel is exposed at dull red heat to vaporised selenium diluted with nitrogen. It is also obtained by the action of hydrogen selenide upon anhydrous nickel chloride at bright red heat.7 It is greyish blue in colour. Density 8-46. 

Nickel Thio-orthophosphate, Ni3(PS4)2, is obtained by heating the requisite quantities of anhydrous nickel chloride and phosphorus pentasulphide in a retort4 ... 

On treatment with aqueous silver nitrate it forms a stable crystalline complex (78), from which 75 can be recovered almost quantitatively by addition of ammonia ". Anhydrous nickel(ii) bromide converts cyclooctyne into the trimer (79) with a quantitative yield . However, when the reaction was carried out in the presence of a trace of water, the dimeric cyclobutadiene-nickel bromide complex (80) was obtained in 9-4% yield, together with 79 (85%) . The spectroscopic properties of 80 showed close similarity with those of the tetramethylcyclobutadiene-nickel chloride complex . 

Nickel Molybdates.-—The normal salt, XiMo04, is obtained in the anhydrous condition by fusion of nickel chloride with sodium molybdate and sodium chloride. In the hydrated condition it may be obtained by crystallising from mixed solutions of nickel chloride and sodium molybdate in the cold, a green pentahydrate, NiMo04.5H20,... 

I. Preparation of Reduced Iron (Cobalt, Nickel) (245). 2. Pr ara-tion of Pyrophoric Iron (246). 3. Preparation of Iron(II) Oxide (246). 4. Preparation of Macrocrystalline Iron(III) Oxide (246). 5. Preparation of Nickel(III) Oxide (247). 6. Preparation and Properties of Sodium Ferrite (247). 7. Preparation of Anhydrous Cobalt (Nickel) Chloride in an Ethanol Solution (247). 8. Preparation of Anhydrous Iron(IlI) Chloride in a Fluidized Bed (247). 9. Preparation of Potassium Trioxalatoferrate(III) (247). 10. Preparation of Tetraamminecarbonatocobalt(III) Nitrate (248). 

Caution. The vapor of 2-chlorobenzenamine is highly toxic, the liquid can also be absorbed through the skin. In addition, both anhydrous nickel chloride and dry (2-aminophenyl)triphenylphosphonium chloride tend to produce a fine dust when handled. It is recommended that procedures involving these materials be conducted in an efficient hood. 

A round-bottomed, 500-mL flask equipped with a Teflon-coated magnetic stirring bar, still-head and condenser is charged with 2-chlorobenzenamine, 128 g (1.00 mol), and triphenylphosphine, 262 g (1.00 mol). Next, 6S g (0.50 mol) of powdered, anhydrous nickel chloride (dried by heating the hexahydrate at 130° for at least 48 hr) is added and the mixture is heated to 200° with stirring. A small amount of residual water distills over. The temperature is maintained at 200-220° for 4 hr. The resulting dark blue melt is cooled to 180-160° then poured (CARE ) into 600 mL of hot (60°) water previously acidified with a few drops of concentrated HCl. BoUing acidified water (400 mL) is added to the reaction vessel to extract any... 

Anhydrous nickel chloride in chlorobenzene suspension is reduced in the presence of excess butadiene with aluminum triethyl. The product is the previously mentioned intermediate, I, of the cyclododecatriene synthesis. 

Nickel chloride (6U20) [7791-20-0 (6H2O), 69098-15-3 (XH2O), 7718-54-9 (anhydrous)] M 237.7. It crystallises from dilute HCl to form the green hexahydrate. At 70 this dehydrates to the tetrahydrate, and at higher temperatures it forms the anhydrous salt. It sublimes in yellow hexagonal scales in a stream of HCl. Store it in a desiccator as it is deliquescent. [Hart Partington J Chem Soc 104 1943.]... 

A pyrrole ring may be formed from azines and either anhydrous nickel chloride or paUadium(II) chloride. Palladium-assisted C—C bond formation connecting one benzene ring to another is also a useful method. A review of transition metal-mediated heterocyclizations was published in 1980 [B-S6]. Bis(methyl-thio)methylenemalonic acid derivatives annulate two methylene groups [2881]. 

Anhydrous nickel chloride, NiCl2, has a layered CdC structure (rhombohedral space group R3m [63FER/BRA]) of cubic close packed chloride ions with 1/2 octahedral holes filled by nickel ions. At T > 52 K a transition of the antiferromagnetic to the paramagnetic state occurs [52BUS/G1A2]. 

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