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Nickel(II) chloride (or just nickel chloride) is the chemical compound NiCl 2. The anhydrous salt is yellow, but the more familiar hydrate NiCl 2 ·6H 2 O is green. Nickel(II) chloride, in various forms, is the most important source of nickel for chemical synthesis. The nickel chlorides are deliquescent, absorbing moisture from the air to form ...
Nickel tert-butoxide Ni[OC(CH 3) 3] 2 is coloured violet. It is formed in the reaction of di-tert-butylperoxide with nickel carbonyl. [60] Nickel dimethoxide is coloured green. [67] There are also nickel chloride methoxides with formulae: NiClOMe, Ni 3 Cl 2 (OMe) 4 and Ni 3 Cl(OMe) 5 in which Nickel and oxygen appear to form a cubane-type ...
Nickel(II) chloride is most common, and its behavior is illustrative of the other halides. Nickel(II) chloride is made by dissolving nickel or its oxide in hydrochloric acid. It is usually found as the green hexahydrate, whose formula is usually written NiCl 2 ·6H 2 O. When dissolved in water, this salt forms the metal aquo complex [Ni(H 2 O ...
Nickel maleate can be made from maleic acid and nickel carbonate in boiling water. A dihydrate crystallises from the water solution. [11] Nickel fumarate prepared from fumaric acid and nickel carbonate is pale green as a tetrahydrate, and mustard coloured as an anhydride. It decomposes when heated to 300° to 340° in vacuum.
Cobalt(II) chloride: CoCl 2: dep blue Cobalt(II) chloride hexahydrate: CoCl 2 ·6H 2 O deep magenta Manganese(II) chloride tetrahydrate: MnCl 2 ·4H 2 O pink Copper(II) chloride dihydrate: CuCl 2 ·2H 2 O blue-green Nickel(II) chloride hexahydrate: NiCl 2 ·6H 2 O green Lead(II) iodide: PbI 2: yellow Ammonium dichromate (NH 4) 2 Cr 2 O 7: orange
Nickel thorium nitrate has formula NiTh(NO 3) 6 · 8 H 2 O. Nickel atoms can be substituted by other ions with radius 0.69 to 0.83 Å. The nitrates are coordinated on the thorium atom and the water to the nickel. Enthalp of solution of the octahydrate is 7 kJ/mol. Enthalpy of formation is -4360 kJ/mol.
"Nickel dichloride hexahydrate" consists of the chloride complex trans-[NiCl 2 (H 2 O) 4 plus water of crystallization. As indicated in the table below, many hydrates of metal chlorides are molecular complexes. [78] [79] These compounds are often important commercial sources of transition metal chlorides. Several hydrated metal chlorides are ...
Tetrachloronickelate is the metal complex with the formula [NiCl 4] 2−. Salts of the complex are available with a variety of cations, but a common one is tetraethylammonium. [1] Sample of (Et 4 N) 2 NiCl 4. When concentrated lithium chloride and nickel chloride solution in water is mixed, only a pentaaquachloro complex is formed: [Ni(H 2 O) 5 ...