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Nickel Dicyanide
Nickel dicyanide is the inorganic compound with a chemical formula Ni(CN)2. It is a gray-green solid that is insoluble in most solvents. Production Addition of two equivalents of sodium or potassium cyanide to a solution of nickel(II) ions in aqueous solution leads to the precipitation of nickel(II) cyanide tetrahydrate. On heating the tetrahydrate to 140 °C, this hydrate converts to anhydrous nickel(II) cyanide. Chemical properties Nickel(II) cyanide dissolves in potassium cyanide solution to produce a yellowish solution containing potassium tetracyanonickelate: : Ni(CN)2 + 2 KCN → K2 i(CN)4Nickel(II) cyanide will react with dimethylglyoxime (dmgH2) and produce hydrogen cyanide Hydrogen cyanide, sometimes called prussic acid, is a chemical compound with the formula HCN and structure . It is a colorless, extremely poisonous, and flammable liquid that boils slightly above room temperature, at . HCN is produced on an ...:《无机化学反应方程式手册》.曹忠 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron(II) Cyanide
Iron(II) cyanide is an inorganic compound with the empirical formula Fe(CN)2. It may have a Fe2[Fe(CN)6] structure. Production Iron(II) cyanide can be produced by dissolving ammonium ferrocyanide at 320 °C. 3 (NH4)4Fe(CN)6 → Fe2Fe(CN)6 + 12 NH4CN Reaction Iron(II) cyanide can react with potassium hydroxide solvent to produce iron(II) hydroxide and potassium ferrocyanide. Fe2Fe(CN)6 + 4 KOH → 2 Fe(OH)2 + K4Fe(CN)6 References {{cyanides Iron(II) compounds Cyanides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cobalt(II) Cyanide
Cobalt(II) cyanide is the inorganic compound with the formula Co(CN)2. It is coordination polymer that has attracted intermittent attention over many years in the area of inorganic synthesis and homogeneous catalysis. Uses Cobalt(II) cyanide has been used as a precursor to dicobalt octacarbonyl. Preparation and structure The trihydrate salt is obtained as a reddish-brown precipitate by adding potassium cyanide to a cobalt salt solution: :CoCl2(H2O)6 + 2 KCN → Co(CN)2 + 2 KCl + 6 H2O Hydrated Co(CN)2 dissolves in the presence of excess potassium cyanide, forming a red solution of K''n''Co(CN)2+''n'' though it is disputed whether ''n''=3 or 4. This material further oxidizes to yellow hexacyanocobaltate(III), which can be isolated as the salt K3Co(CN)6. The solid is a coordination polymer consisting of cobalt atoms linked by cyanide units in a cubic arrangement, each such cobalt atom having octahedral geometry, and an additional cobalt atom in half of the cubic cavities. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potassium Cyanonickelate
Potassium is the chemical element with the symbol K (from Neo-Latin '' kalium'') and atomic number19. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure. It was first isolated from potash, the ashes of plants, from which its name derives. In the periodic table, potassium is one of the alkali metals, all of which have a single valence electron in the outer electron shell, that is easily removed to create an ion with a positive charge – a cation, that combines with anions to form salts. Potassium in nature occurs only in ionic salts. Elemental potassium reacts vigorously with water, generating sufficient heat to ignite hydrogen emitted in the reaction, and burning with a lilac- colored flame. It is found dissolved in sea water (which is 0.04% potassium by weight), and occurs in many minerals such as orthoclase, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
