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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 niobate; Nickel organic acid salts; Nickel oxide hydroxide; Nickel oxyacid salts; Nickel selenide; Nickel silicide; Nickel succinate; Nickel sulfide;
A nickelate is an anion containing nickel or a salt containing a nickelate anion, or a double compound containing nickel bound to oxygen and other elements. Nickel can be in different or even mixed oxidation states, ranging from +1, +2, +3 to +4. The anions can contain a single nickel ion, or multiple to form a cluster ion.
Nickel forms double salts with Tutton's salt structure with tetrafluoroberyllate with the range of cations of ammonia, [4] potassium, rubidium, cesium, [5] and thallium. [ 6 ] Anhydrous salts of the formula M 2 Ni 2 (SO 4 ) 3 , which can be termed metal nickel trisulfates, belong to the family of langbeinites .
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 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]
In chemistry, a salt is a neutral compound composed of cations bound to anions. In general, these salts are ionic compounds which form crystals . They are often soluble in water , where the two ions separate.