![]() ![]() "Bis(ethylenediamine)sulfito Complexes of Cobalt(III)". "Carbonatotetramminecobalt(III) Nitrate". Bis(Dimethylglyoximato)Cobalt Complexes: ("Cobaloximes"). Cobalt Liquid density at m.p., 7.75 gcm Melting point, 1768 K (1495 C, 2723 F) Boiling point, 3200 K (2927 C, 5301 F) Heat of fusion, 16.06 kJmol. Sublimation The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Cobalt is best known as a raw material in lithium-ion batteries, but its high melting point and ability to maintain strength even at raised temperatures make it useful in cutting tools. The Electronic Beam Melting (EBM) 3D Printer market report provides a detailed analysis of global market size, regional and country-level market size, segmentation market growth, market share. Boiling point The temperature at which the liquidgas phase change occurs. Radioactive cobalt-60 is used in cancer therapy. Hawley's Condensed Chemical Dictionary (14th Edition). Melting point The temperature at which the solidliquid phase change occurs. Cobalt Melting Point 1495C Discovery Discovered By: George BrandtYear: 1739Location: Sweden State at 20 C Solid Uses Used in many hard alloys for magnets, ceramics and special glasses. ^ Ernst B, Libs S, Chaumette P, Kiennemann A."The Crystal Structure of Cobalt Nitrate Dihydrate, Co(NO 3) 2♲H 2O". "Anhydrous Nitrates and Nitrosonium Nitratometallates of Manganese and Cobalt, M(NO 3) 2, NO, and (NO) 2: Synthesis and Crystal Structure". ^ a b c John Dallas Donaldson, Detmar Beyersmann, "Cobalt and Cobalt Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2005.The hexahydrate is prepared treating metallic cobalt or one of its oxides, hydroxides, or carbonate with nitric acid:Ĭo + 4 HNO 3 + 4 H 2O → Co(H 2O) 6(NO 3) 2 + 2 NO 2 CoO + 2 HNO 3 + 5 H 2O → Co(H 2O) 6(NO 3) 2 CoCO 3 + 2 HNO 3 + 5 H 2O → Co(H 2O) 6(NO 3) 2 + CO 2 References Ĭobalt(II) nitrate is a common starting material for the preparation of coordination complexes such as cobaloximes, carbonatotetraamminecobalt(III), and others. It is used in the preparation of dyes and inks. It can be absorbed on to various catalyst supports for use in Fischer–Tropsch catalysis. It is commonly reduced to metallic high purity cobalt. Above 55 ☌, the hexahydrate converts to the trihydrate and at higher temperatures to the monohydrate. The hexahydrate is better described as hexaaquacobalt(II) nitrate, 2, as it consists of discrete 2+ and − ions. The tetrahydrate consists of discrete, octahedral molecules. The dihydrate is a two-dimensional polymer, with nitrate bridges between Co(II) centres and hydrogen bonding holding the layers together. Each nitrate ion coordinates to three cobalts. These hydrates have the chemical formula Co(NO 3) 2Īnhydrous cobalt(II) nitrate adopts a three-dimensional polymeric network structure, with each cobalt(II) atom approximately octahedrally coordinated by six oxygen atoms, each from a different nitrate ion. Related subjects: Chemical elements Melting point, 1768 K (1495 C, 2723 F) Boiling point, 3200 K (2927 C, 5301 F). Composition and structures Īs well as the anhydrous compound Co(NO 3) 2, several hydrates of cobalt(II) nitrate exist. The most common form is the hexahydrate Co(NO 3) 2♶H 2O, which is a red-brown deliquescent salt that is soluble in water and other polar solvents. ![]()
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