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Cobalt(II) chloride is an inorganic compound, a salt of cobalt and chlorine, with the formula CoCl 2.The compound forms several hydrates CoCl 2 ·n H 2 O, for n = 1, 2, 6, and 9. . Claims of the formation of tri- and tetrahydrates have not been confirmed
Cobalt can easily react with nitric acid to form cobalt(II) nitrate Co(NO 3) 2. Cobalt(II) nitrate exists in the anhydrous form and the hydrate form, of which the hexahydrate is the most common. Cobalt nitrate hexahydrate (Co(NO 3) 2 ·6H 2 O) is a red deliquescence crystal that is easily soluble in water, [12] and its molecule contains cobalt ...
Copper(II) sulfate anhydrate: CuSO 4: white Copper(II) sulfate pentahydrate: CuSO 4 ·5H 2 O blue Copper(II) benzoate: Cu(C 7 H 5 O 2) 2: blue 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 ...
Consequently, cobalt(III) chloride would spontaneously reduce to cobalt(II) chloride and chlorine. Because the reduction potential for fluorine to fluoride is so high, +2.87 V, cobalt(III) fluoride is one of the few simple stable cobalt(III) compounds. Cobalt(III) fluoride, which is used in some fluorination reactions, reacts vigorously with water.
Consider the case of nickel(II) chloride hexahydrate. This species has the formula NiCl 2 (H 2 O) 6 . Crystallographic analysis reveals that the solid consists of [ trans - NiCl 2 (H 2 O) 4 ] subunits that are hydrogen bonded to each other as well as two additional molecules of H 2 O .
One of the methods used for producing the Co-C bond is to make use of the supernucleophilicity of the Co I center. Chloro(pyridine)cobaloxime(III) is first reduced to Chloro(pyridine)cobaloxime(I) by sodium borohydride in alkaline solution, then an alkyl halide is added into the reaction mixture, and the desired Co-C bond is formed via a S N 2 ...
A colorful example is cobalt(II) chloride, which turns from blue to red upon hydration, and can therefore be used as a water indicator.. The notation "hydrated compound⋅n H 2 O", where n is the number of water molecules per formula unit of the salt, is commonly used to show that a salt is hydrated.
Comparison of chemical gardens grown by NASA scientists on the International Space Station (left) and on the ground (right) A chemical garden while growing Cobalt(II) chloride A chemical garden. A chemical garden is a set of complex biological-looking structures created by mixing inorganic chemicals.