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The nickel organic acid salts are organic acid salts of nickel. In many of these the ionised organic acid acts as a ligand. Nickel acetate has the formula (CH 3 COO) 2 Ni·4H 2 O. It has monodentate acetate and hydrogen bonding. A dihydrate also exists. Nickel acetate is used to seal anodised aluminium. [1]
Nickel ions can act as a cation in salts with many acids, including common oxoacids. Salts of the hexaaqua ion (Ni · 6 H 2 O 2+) are especially well known. Many double salts containing nickel with another cation are known. There are organic acid salts. Nickel can be part of a negatively charged ion (anion) making what is called a nickellate.
Nickel sulfamate can be used for nickel or mixed nickel-tungsten plating. [8] It can be formed by the action of sulfamic acid on nickel carbonate. [9] Nickel selenite NiSeO 3 has many different hydrates, anhydrous NiSeO 3 · 1 ⁄ 3 H 2 O, NiSeO 3 · H 2 O, NiSeO 3 · 2 H 2 O (which is also a mineral called ahlfeldite), and NiSeO 3 · 4 H 2 O. [10]
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 ...
Double fluorides include the above-mentioned fluoroanion salts, and those fluoronickelates such as NiF 4 and NiF 6.Other odd ones include an apple green coloured KNiF 3 ·H 2 O and NaNiF 3 ·H 2 O, aluminium nickel pentafluoride AlNiF 5 ·7H 2 O, ceric nickelous decafluoride Ce 2 NiF 10 ·7H 2 O, niobium nickel fluoride Ni 3 H 4 Nb 2 F 20 ·19H 2 O, vanadium nickel pentafluoride VNiF 5 ·7H 2 ...
The compound can be prepared by treating nickel or nickel(II) carbonate with acetic acid: . NiCO 3 + 2 CH 3 CO 2 H + 3 H 2 O → Ni(CH 3 CO 2) 2 ·4 H 2 O + CO 2. The mint-green tetrahydrate has been shown by X-ray crystallography to adopt an octahedral structure, the central nickel centre being coordinated by four water molecules and two acetate ligands. [5]
Nickel aluminide; Nickel arsenide; Nickel boride catalyst; Nickel dicyanide; Nickel double salts; Nickel formate; Nickel hydrazine nitrate; Nickel hydride; Nickel manganese oxide; Nickel monosilicide; Nickel niobate; Nickel organic acid salts; Nickel oxide hydroxide; Nickel oxyacid salts; Nickel selenide; Nickel silicide; Nickel succinate ...
As a dihydrate, nickel formate is a green, odorless, non-flammable solid that is sparingly soluble in water. [2] The compound has a monoclinic crystal structure. [3] The anhydride forms on careful heating at 130–140 °C. [6] When heated in a vacuum to 300 °C, pure nickel is formed: [5] Ni(HCO 2) 2 (H 2 O) 2 → Ni + 2 CO 2 + 2 H 2 O + H 2