Cobaltous chloride oxide

Cobalt(II) chloride hexahydrate [7791-13-1], C0CI2 6H20 is a deep red monoclinic crystalline material that deflquesces. It is prepared by reaction of hydrochloric acid with the metal, simple oxide, mixed valence oxides, carbonate, or hydroxide. A high purity cobalt chloride has also been prepared electrolyticaHy (4). The chloride is very soluble in water and alcohols. The dehydration of the hexahydrate occurs stepwise ... 

Cobalt compounds can be classified as relatively nontoxic (33). There have been few health problems associated with workplace exposure to cobalt. The primary workplace problems from cobalt exposure are fibrosis, also known as hard metal disease (34,35), asthma, and dermatitis (36). Finely powdered cobalt can cause siUcosis. There is Htfle evidence to suggest that cobalt is a carcinogen in animals and no epidemiological evidence of carcinogenesis in humans. The LD q (rat) for cobalt powder is 1500 mg/kg. The oral LD q (rat) for cobalt(II) acetate, chloride, nitrate, oxide, and sulfate are 194, 133, 198, 1700, 5000, and 279 mg/kg, respectively the intraperitoneal LD q (rat) for cobalt(III) oxide is 5000 mg/kg (37). 

Kobalto-. cobaltous, cobalto-, cobalt(II). -chlorid, n. cobaltous chloride, cobalt(II) chloride, -cyanwasserstoff, m., -cyanwasser-stoffs ure, /. cobaltocyanic acid, -nitrat, n. cobaltous nitrate, cobalt(II) nitrate, -oxyd, n. cobaltous oxide, cobalt (II) oxide, -salz, n. cobaltous salt, cobalt(IJ) salt, -sulfat, n. cobaltous sulfate, cobalt(II) sulfate, -sulfid, n. cobaltous sulfide, cobalt (II) sulfide, -verbindung, /. cobaltous compound. cobalt(II) compound. 

An ionic compound is named with the cation name first, followed by the name of the anion the word ion is omitted in each case. The oxidation number of the cation is given if more than one charge is possible. However, if the cation comes from an element that exists in only one charge state (as listed in Fig. C.6), then the oxidation number is omitted. Typical names include potassium chloride (KC1), a compound containing K+ and Cl" ions and ammonium nitrate (NH4NOs), which contains NH4+ and NO3" ions. The cobalt chloride that contains Co2+ ions (CoCl,) is called cobalt(II) chloride C0CI3 contains Co3+ ions and is called cobalt(III) chloride. 

It was shown that dibenzothiophene oxide 17 is inert to 1-benzyl-1,4-dihydro nicotinamide (BNAH) but that, in the presence of catalytic amounts of metalloporphyrin, 17 is reduced quantitatively by BNAH. From experimental results with different catalysts [meso-tetraphenylporphinato iron(III) chloride (TPPFeCI) being the best] and a series of substituted sulfoxides, Oae and coworkers suggest an initial SET from BNAH to Fe followed by a second SET from the catalyst to the sulfoxide. The results are also consistent with an initial coordination of the substrate to Fe , thus weakening the sulfur-oxygen bond in a way reminiscent of the reduction of sulfoxides with sodium borohydride in the presence of catalytic amounts of cobalt chloride . ... 

Konstantaki, M. Pissadakis, S. Pispas, S. Madamopoulos, N. Vainos, N. A., Optical fiber long period grating humidity sensor with poly(ethylene oxide)/cobalt chloride coating, Appl. Opt. 2006,45,4567 4571... 

Additional details regarding the samples were obtained by inferring from the elemental analysis the amount of cobalt present as oxide and chloride. The only source of chlorine in these samples is the cobalt chloride dopant. Thus, based on the chlorine concentration we can estimate the amount of cobalt that must be present as cobalt chloride. For example, film t5 is calculated to contain 78.7% of the cobalt as chloride and by difference about 21% as cobalt oxide. Film 7 (which is film 5 after both a 24 hour soa)c and a 24 hour extraction with DMAc) contains 20% of the cobalt... 

Beccalli et al. reported a new synthesis of staurosporinone (293) from 3-cyano-3-(lH-indol-3-yl)-2-oxo propionic acid ethyl ester (1464) (790). The reaction of 1464 with ethyl chlorocarbonate and triethylamine afforded the compound 1465, which, on treatment with dimethylamine, led to the corresponding hydroxy derivative 1466. The triflate 1467 was prepared from 1466 by reaction with trifluoromethanesulfonic anhydride (Tf20) in the presence of ethyldiisopropylamine. The palladium(O)-catalyzed cross-coupling of the triflate 1467 with the 3-(tributylstannyl)indole 1468 afforded the vinylindole 1469 in 89% yield. Deprotection of both nitrogen atoms with sodium ethoxide in ethanol to 1470, followed by photocyclization in the presence of iodine as the oxidizing agent provided the indolocarbazole 1471. Finally, reductive cyclization of 1471 with sodium borohydride-cobaltous chloride led to staurosporinone (293) in 40% yield (790) (Scheme 5.248). 

Cobalt(lll) fluoride may be prepared by reaction of elemental fluorine with cobalt(ll) fluoride, cobalt(ll) chloride or cobalt(III) oxide at 300 to 400°C. 

Cobalt(II) oxide reacts with acids forming their cobalt(II) salts. Reactions with sulfuric, hydrochloric and nitric acids yield sulfate, chloride and nitrate salts, respectively, obtained after the evaporation of the solution ... 

Tetrammino - cobaltous Chloride, [Co(NH3)4]C12, is produced if ammonia gas is passed over anhydrous cobaltous chloride. Ammonia is rapidly absorbed, increase in volume takes place, and a reddish-white powder is formed. This decomposes on heating with evolution of ammonia, leaving a residue of cobalt oxide. 

Chloro-pentammino-cobaltic chloride was first prepared by the oxidation of an ammoniaeal solution of cobaltous chloride containing ammonium chloride and the subsequent precipitation of the oxidation product with hydrochloric aeid. It is the best known and the longest known of the cobalt-ammines. 

L [(OH),Co en Jg cobaltous chloride and ethylenediamine on oxidation with air and subsequent treatment with sodium chloride to precipitate the compound. The crude salt contains a little triethylenediamino-cobaltic chloride, which is removed from the sparingly soluble tetraethylenediamino-diaquo-tetrol-chloride by washing with water. It is a bright red micro-crystalline powder. 

Synonym Gamma-Chloropropylene Oxide 3-Chloro-1,2-Propylene Oxide Chlorosulfonic Acid Chlorothene Chiorotoluene, Alpha Alpha-Chlorotoluene Omega-Chlorotoluene Chlorotrifluoroethylene Chlorotrimethylsilane Chlorsulfonic Acid Clilorylen Clip Chromic Acid Chromic Anhydride Chromic Oxide Chromium (VI) Dioxychloride Chromium Oxychloride Chromium Trioxide Chromyl Chloride Cianurina Citric Acid Citric Acid, Diammonium Salt Clarified Oil Clorox Cc Ral Coal Tar Oil Cobalt Acetate Cobalt Acetate Tetrahydrate Cobalt (II) Acetate Cobalt Chloride Cobalt (II) Chloride Cobaltous Acetate Cobaltous Chloride Cobaltous Chloride Dihydrate Cobaltous Chloride Hexahydrate Cobaltous Nitrate Cobaltous Nitrate Hexahydrate Cobaltous Sulfate Heptahydrate Cobalt Nitrate Cobalt (II) Nitrate Cobalt Sulfate Compound Name Epichlorohydrin Epichlorohydrin Chlorosulfonic Acid Trichloroethane Benzyl Chloride Benzyl Chloride Benzyl Chloride Trifluorochloroethylene Trimethylchlorosilane Chlorosulfonic Acid Trichloroethylene Cumene Hydroperoxide Chromic Anhydride Chromic Anhydride Chromic Anhydride Chromyl Chloride Chromyl Chloride Chromic Anhydride Chromyl Chloride Mercuric Cyanide Citric Acid Ammonium Citrate Oil Clarified Sodium Hypochlorite Coumaphos Oil Coal Tar Cobalt Acetate Cobalt Acetate Cobalt Acetate Cobalt Chloride Cobalt Chloride Cobalt Acetate Cobalt Chloride Cobalt Chloride Cobalt Chloride Cobalt Nitrate Cobalt Nitrate Cobalt Sulfate Cobalt Nitrate Cobalt Nitrate Cobalt Sulfate... 

Cobalt Chloride — Fire Hazards Flash Point (deg. F) Not flammable Flammable Limits in Air (%) Not flammable Fire Extinguishing Agents Not pertinent Fire Extinguishing Agents Not To Be Used Not pertinent Special Hazards of Combustion Products Toxic cobalt oxide fumes can form in fire situations Behavior in Fire Not pertinent Ignition Temperature (deg. F) Not pertinent ... 

Substituting cobalt chloride for the nitrate, proceed as in Exercise 68, following the directions until the oxidation is complete and a deep red solution is obtained. Add 5 g. of ammonium chloride and evaporate the solution to a syrup. Then add dilute hydrochloric acid to decompose all carbonate and saturate the solution with ammonia gas to decompose any tetrammine salt that may be present. Add an excess of concentrated hydro-... 

Prepare a cold solution of 27 g. of sodium nitrite and 20 g. of ammonium chloride in 150 cc. of water and to this add a solution of 18 g. of crystallized cobalt chloride in 50 cc. of water. To the solution so obtained, add 100 cc. of concentrated ammonium hydroxide (20 per cent). Through this solution, draw a rapid current of air for about 3 hr. to oxidize the cobalt, by which time it should be brown in color and somewhat viscous. Pour the solution into an evaporating dish and set it aside in the open air under a hood for three or four days. Filter off by suction the crystals that have been slowly depositing and wash them with successive portions of cold water until the filtrate no longer gives a test for chloride ion. 

Ten grams of ehloropentamminecobalt (III) chloride (see No. 119) are dissolved on the steam bath in a mixture of 110ml of water and 10ml of concentrated ammonia any black residue of cobalt (III) oxide is filtered off. 

Forty grams of cobalt carbonate are combined with a mixture of concentrated hydrochloric acid and 40ml of water are used or a solution of 80g of cobalt chloride 6-hydrate in 106ml of hot water. The oxidized solution is... 

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