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Anhydrous cobalt(II) chloride is blue, while the hexahydrate is magenta in colour. [1] Because the color change of cobalt(II) chloride in different hydrates, it can be used to manufacture color-changing silica gel. Anhydrous cobalt halides react with nitric oxide at 70~120 °C to generate [Co(NO) 2 X] 2 (X = Cl, Br or I).
6 has been identified in preparations of cobalt(III) salts and hydrochloric acid HCl in glacial acetic acid. [1] In solutions of cobalt(III) salts with chloride ions, the anionic complexes (H 2 O) 5 Co(Cl) 2+ and (H 2 O) 4 (OH)Co(Cl) + are present. [11] Trichlorides of cobalt(III) complexed with various ligands, such as organic amines, can be quite
On the other hand, cobalt(III) chlorides can be obtained if the cobalt is bound also to other ligands of greater Lewis basicity than chloride, such as amines. For example, in the presence of ammonia, cobalt(II) chloride is readily oxidised by atmospheric oxygen to hexamminecobalt(III) chloride: 4 CoCl 2 ·6 H 2 O + 4 NH 4 Cl + 20 NH 3 + O 2 → ...
Cobalt chloride (cobalt paper) may refer to: Cobalt(II) chloride (CoCl 2) Cobalt(III) chloride (CoCl 3 This page was last edited on 21 February ...
Cobalt(II) perchlorate hexahydrate is produced by reacting cobalt metal or cobalt(II) carbonate with perchloric acid, followed by the evaporation of the solution: [1] CoCO 3 + 2 HClO 4 → Co(ClO 4) 2 + H 2 O + CO 2. The anhydrous form cannot be produced from the hexahydrate by heating, as it instead decomposes to cobalt(II,III) oxide at 170 °C.
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The chloride ion in this salt readily undergoes ion exchange. The compound is synthesized by the oxidation of a mixture of cobalt(II) chloride, lithium hydroxide, and ethylenediamine in the presence of carbon dioxide: [1] CoCl 2 + 2 en + CO 2 + 0.5 H 2 O 2 + LiOH → [CoCO 3 (en) 2]Cl + H 2 O + LiCl. The cationic complex is octahedral with C 2 ...
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