TV- ammonium nitrate

Cerium (TV) ammonium nitrate (CAN)37 and a cerium (TV) impregnated resin38 are able to catalyze the selective oxidation of secondary alcohols with sodium bromate (NaBrOi). Stoichiometric cerium bromate— CelBrCb h, prepared in situ from barium bromate and cerium (III) sulfate, is also able to perform selective oxidations of secondary alcohols.39... 

Nitration of naphthalene by use of cerium(TV) ammonium nitrate suspended on silica gel, or in homogeneous solution, in the presence of alcohols, sodium or tetrabutylammonium nitrite and acid gives mainly l-alkoxy-4-nitronaphthalenes together with some of the 2-nitro isomers.34 The results are consistent with initial attack by N02- alone or complexed with cerium(IV) ion at the 1- and 2-positions in a ratio of 5 1. 

Hie precursors, cerium(TV) ammonium nitrate (NH4)2Ce(N03)3 and praseodymium(lll) nitrate Fh-(N03)3 6H20, are added in a i I weight ratio to the molten salts at 673 - 873 K, and the melt is maintained for 15 - 120 min. After the melt is quenched to room temperature, the reaction products are washed with water and then dried at 393 K. Well-crystallized Ce,.jPr,02 (x = 0 - 10) powders with very fine size (10 - 20 nm), narrow size distribution, and a clearly spherical shape are obtained. 

Ceiium(tV) ammonium nitrate, 67 Thalltum(lll) trifluoroaceiate. 295 Allyhc iodides... 

Catechols and hydroquinones can be converted (91-98%) into quinones by cerium(IV) salts coated onto silica as free-flowing yellow powder from impregnation with cerium(TV) ammonium nitrate. This reaction is usually performed in the presence of magnesium sulfate. The same (NH4)2Ce(N03)6 Si02 reagent in the dry state effects oxidative nitrations of arenes. For example a-naphthol is converted to the ortho (42%) and the para (38%) nitro compounds, while its methyl or ediyl ethers give exclusively the para nitration product (equation 4). In solution, the products are contaminated with the products of dinitration and of oxidation into quinones. ... 

Alternatively, 5-allyl-2(5/f)-furanones can be obtained from TMSOF and allylic acetates using lithium perchlorate in ether. 5-Propargyl-2(5//)-furanones are prepared by coupling with bex-acarbonyldicobalt complexes of propargylium cations (eq 5). Reaction of the intermediate complex with cerium(TV) ammonium nitrate removes the cobalt Fluoroalkylation is acbieved by using bis(fluoroalkanoyl) peroxides in 1,1,2-tricbloro-1,2,2-trifluoroethane (Freon 113) (eq 6). This process is believed to involve combination of a fluoroalkyl radical with the furan-derived radical cation. 

Resacetophenone by treatment with cerium (TV) ammonium nitrate in hot acetic acid yields 2,4-di-hydroxy-3,5-dinitroacetophenone (22%) [1937]. 

The preparation of Ce(IV) compounds free of foreign metals is facilitated by the fact that, when ammonium nitrate is added to a concentrated nitric add solution of Ce(IV), the compound (NH4)2Ce(N03)g is precipitated in relatively pure form. Because the Ce(rV) exists as the complex ion Ce(N03)g", the ammonium salt is properly caUed ammonium hexanitratocerate(TV). In water and in dilute nitric acid, extensive dissodation occurs. Ammonium hexanitratocerate(IV) was suggested as a primary standard, and drying it to constant weight at 100°C was recommended. Later it was recognized that slow decomposition occurs at this temperature, and Smith and Fly recommended a procedure that involved drying a product of primary-standard grade at 85°C for 1 to 6 h. The accurate results of Smith and Fly have been confirmed. ... 

Hydrogen peroxide, formed from hydroxyl radicals, also can be involved. Photochemical reduction is negligible in sulfuric acid solution, because of the low concentration of Ce ions. Furman stated that 0.1 Af solutions of Ce(TV) in sulfuric acid solutions are stable for at least 6 years, but was of the opinion that nitrate and ammonium ions are undesirable. Stored at room temperature, 0.1 M Ce(IV) in nitric or perchloric acid solutions showed a 0.01 to 0.03% decrease in concentration per day. ° Protection from light is necessary for nitric and perchloric but hot for sulfuric acid solutions. 

Ammonium hexanitratocerate(IV) as a standard oxidant for reactions at room temperature has been developed for several substances. " Oxalate can be titrated with Ce(IV) in 0.5 M HNO3 with an iodide catalyst mandelic acid at a lower acid concentration, 0.1 MHNO3 Mn(II) with excess Ce(TV) in 0.5 to 2M HNO3 with silver nitrate catalyst hydrazine or isonicotinic acid in HCl-KBr solution and As(III) in HCl, HNO3, or H2SO4 solution with a trace of iodine as catalyst. 

Solid-phase extraction of various analyte complexes on e.g. microcrystalline naphthalene (Ni [23] and Cu [24] with nitroso-R salt and tetradecyldimethylbenzylammonium chloride), ammonium tetraphenylborate-naphthalene (U with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol) [25], chitin column (Cr(VI) with 1,5-diphenylcarbazide) [26], strong anion-exchange cartridge (Cr(VI) at pH 8) [27], Cig cartridge (CL-azo dye) [28] and minicolumn (As with ammonium diethyl dithiophosphate) [29], silica modified chemically with A-allyl- or A-phenyl-TV -propylthiourea (OSO4) [30] and Sephadex DEAE A-25 (chloride form) (V with Eriochrome Cyanine R) [31] prior to the spectrophotometric determination has recently been reported. The application of solid-phase spectrophotometry to determine nitrite and nitrate in water samples has recently been described [32]. 

Alkaline hydrolysis of starch nitrate produced ammonia, cyanides, nitrites, and nitrates.1478 Starch nitrate could be denitrated by use of diluted solutions of ammonium sulfite followed by the addition of hydrogen peroxide to remove colloidal sulfur.1448 The strong nitrate band absorption in the infrared between 730 and 960 cm-1 complicates the identification of polysaccharides. The region suitable for identification of starch nitrates is between 900 and 1350 cm M479 Nitration of glyceryl starch into a trinitrate was also reported.1480 Starch nitrates readily react with an TV.TV-dimethylformamidc-SO complex to give trisulfates.1481... 

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