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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(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(II) hydrated ions ([Co(H 2 O) 6 ] 2+ ) and free nitrate ions. [ 13 ]
The cobalt chloride mentioned above occurs as [Co(H 2 O) 6] 2+ and Cl −. In tin chloride, each Sn(II) center is pyramidal (mean O/Cl−Sn−O/Cl angle is 83°) being bound to two chloride ions and one water. The second water in the formula unit is hydrogen-bonded to the chloride and to the coordinated water molecule.
Cobalt(III) chloride or cobaltic chloride is an unstable and elusive compound of cobalt and chlorine with formula CoCl 3. In this compound, the cobalt atoms have a formal charge of +3. [1] The compound has been reported to exist in the gas phase at high temperatures, in equilibrium with cobalt(II) chloride and chlorine gas.
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.
trans-Dichlorobis(ethylenediamine)cobalt(III) chloride is a salt with the formula [CoCl 2 (en) 2]Cl (en = ethylenediamine). It is a green diamagnetic solid that is soluble in water. It is the monochloride salt of the cationic coordination complex [CoCl 2 (en) 2] +. One chloride ion in this salt readily undergoes ion exchange but the two other ...
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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