Ammonium acetate nitrite

Iodine, acetone or DMF, ammonium acetate, it, 2 h. The tritylaminophenyl group is stable to isoamyl nitrite/acetic acid. ... 

The o-aminophenylpropiolic acid 4 (20 g) in water (60 mL) and aqueous ammonia (9 mL, d = 0.88) was added with shaking during 15 minutes to a mixture prepared from ferrous sulfate (220 g), water (440 mL), and aqueous ammonia (110 mL, d = 0.88). After 45 minutes, with occasional shaking but no external cooling, the suspension was filtered. The residue was washed with water, and the combined filtrates were treated with ammonium acetate (60 g) and made weakly acidic with acetic acid. The solution was then cooled to 0°C by addition of crushed ice, and then made acidic to Congo-red with concentrated hydrochloric acid (70-80 mL). Additional hydrochloric acid (20 mL, 2 N) was immediately added, and the turbid solution which resulted was diazotized with 20% aqueous sodium nitrite, after which the mixture was kept at 70°C. The cinnoline acid 6 was separated over 45 minutes as a dark brown, granular solid (12.5 g), m.p. 260-265°C. ... 

Direct bromination readily yields the 6-bromo derivative (111), just as with uracil. Analogous chlorination and iodination requires the presence of alkalies and even then proceeds in low yield. The 6-chloro derivative (113) was also obtained by partial hydrolysis of the postulated 3,5,6-trichloro-l,2,4-triazine (e.g.. Section II,B,6). The 6-bromo derivative (5-bromo-6-azauracil) served as the starting substance for several other derivatives. It was converted to the amino derivative (114) by ammonium acetate which, by means of sodium nitrite in hydrochloric acid, yielded a mixture of 6-chloro and 6-hydroxy derivatives. A modified Schiemann reaction was not suitable for preparing the 6-fluoro derivative. The 6-hydroxy derivative (115) (an isomer of cyanuric acid and the most acidic substance of this group, pKa — 2.95) was more conveniently prepared by alkaline hydrolysis of the 6-amino derivative. Further the bromo derivative was reacted with ethanolamine to prepare the 6-(2-hydroxyethyl) derivative however, this could not be converted to the corresponding 2-chloroethyl derivative. Similarly, the dimethylamino, morpholino, and hydrazino derivatives were prepared from the 6-bromo com-pound. ... 

Non-absorbing BGEs such as tetraborate at pH 9.3 and phosphate at pH values 10.2, 7.5, 6.5, 6.25, 6, or 2.5 may be used. Low pH buffers are also useful for the separation of nitrite from nitrate, taking advantage of their respective of 3.29 and —1.3. Special applications are CE—MS-compatible buffers where ammonium hicarhonate or ammonium acetate may be used. 

Sixty grams of ammonium acetate and 40g of sodium nitrite are added to 50ml of water the stirred mixture is carefully warmed to 25-30°C. When solution is complete, the clear, rather viscous liquid is mixed well with the am-moniacal nickel solution and allowed to stand at room temperature. Precipitation of the red complex, which soon begins, is complete after about one hour. When the preparation has stood overnight, the faintly-colored viscous mother liquor is carefully decanted and the salt is brought onto the filter with 95% alcohol. It is washed with 50ml more of the solvent (both sodium nitrite and ammonium acetate are soluble) and dried in air. 

Ammonium Cobalti-nitrite, 4(NH4)3Co(N02)s.3Ha0, was first prepared in 1856 by Gibbs and Genth. Erdmann 2 obtained it by the action of ammonium nitrite upon cobalt chloride solution acidulated with acetic acid. It may also be obtained by adding semicarbazide to a solution of sodium cobalti-nitrite 3 and by double decomposition of solutions of ammonium chloride and sodium cobalti-nitrite or by addition of nitrous acid to a suspension of cobalt carbonate in the requisite quantity of ammonium nitrite solution.4 In all three cases the salt is precipitated out. 

AMMONIUM ACETATE (631-61-8) Violent reaction with strong oxidizers, ammonium nitrate, chlorine trifluoride, magnesium, potassium nitrite, sodium chlorate, sodium hypochlorite. Incompatible with nitrates. Forms a heat-sensitive explosive with 5-azidotetra-zole. Reacts with gold chloride, forming fulminating gold, a heat-, friction-, and impact-sensitive explosive. Incompatible with sodium dichloroisocyanurate. 

It is therefore recommended to add sodium nitrite solution before using acid for destruction of unwanted LA (or also sodium azide) residues in the laboratory or even in industrial applications [3, 5, 21]. Urbahski recommends the use of 8 % solution of sodium nitrite and 15 % nitric acid for LA [30], whereas 92 % sulfuric acid is recommended for sodium azide [5]. Many other reactions have been proposed for the decomposition of LA, including reaction with sodium polysulfide [21] or dissolving LA in ammonium acetate and adding sodium or potassium bichromate until no more lead chromate precipitates [5],... 

Yebra et al. [83] used a continuous-flow procedure for the indirect determination of sodium cyclamate by flame atomic absorption spectrometry (FAAS). This method is based on oxidation of the sulfamic group derived from cyclamate to sulfate in acidic conditions and in the presence of sodium nitrite. The procedure is adapted to a flow system with precipitate dissolution (Figure 24.11), where sulfate formed is continuously precipitated with lead ion. The lead sulfate formed is retained on a filter, washed with diluted ethanol, and dissolved in ammonium acetate (because of the formation of soluble lead acetate) for online FAAS determination of lead, the amount of which in the precipitate is proportional to that of cyclamate in the sample. In this work a home-made filtration device was used made of a Teflon tubing packed with a cotton pulp and the ends of the filter column were plugged with filter paper (chamber inner volume 141 J,L). This precipitate collector was effective in retaining the precipitate and did not produce excessive back-pressure if the precipitate was dissolved following each precipitation cycle. 

Diazoaminobenzene has been prepared by the action of sodium nitrite on aniline sulfate by the action of sodium nitrite on aniline hydrochloride by the action of sodium nitrite and sodium acetate on aniline hydrochloride by the action of ammonium nitrate and hydrogen sulfide on aniline hydrochloride in the presence of iron and by the action of amyl nitrite on aniline. ... 

The immediate outcome of the Hantzsch synthesis is the dihydropyridine which requires a subsequent oxidation step to generate the pyridine core. Classically, this has been accomplished with nitric acid. Alternative reagents include oxygen, sodium nitrite, ferric nitrate/cupric nitrate, bromine/sodium acetate, chromium trioxide, sulfur, potassium permanganate, chloranil, DDQ, Pd/C and DBU. More recently, ceric ammonium nitrate (CAN) has been found to be an efficient reagent to carry out this transformation. When 100 was treated with 2 equivalents of CAN in aqueous acetone, the reaction to 101 was complete in 10 minutes at room temperature and in excellent yield. 

Besides Fe-, other reducing agents that may be used in conjunction with H2O2 are aliphatic amines, Na2S203 thiourea, ascorbic acid, glyoxal, sulfuric acid, NaHSOs, sodium nitrite, ferric nitrate, peroxidase, AgNOs, tartaric acid, hydroxylamine, ethylene sulfate, sodium phosphite, formic acid, ferrous ammonium sulphate, acetic acid, ferrous sulphate, and HNO2, etc,... 

Sodium Sodium nitrite Sodium peroxide See alkali metals (above) Ammonium nitrate and other ammonium salts Any oxidizable substance, such as ethanol, methanol, glacial acetic acid, acetic anhydride, benzaldehyde, carbon disulphide, glycerol,... 

Plumes from biomass burning can also have unique signatures. For example, organics, ammonium, potassium, sodium, nitrate, nitrite, sulfate, chloride, phosphate, elemental carbon, and the anions of organic acids (formate, acetate, oxalate, etc.) have all been measured in particles in the plumes from burning vegetation (e.g., see Cofer et al., 1988 Andreae et al., 1988 and Artaxo et al., 1994). 

Glacial acetic acid. Ammonium picramic acid Phenol, Sulfuric acid. Nitric acid. Water Aspirin, Sulfuric acid. Potassium nitrate. Alcohol Phenol, Sodium hydroxide. Sodium nitrite. Nitric acid Chlorobenzene, Potassium nitrate. Sulfuric acid. Acetone, Methanol... 

Nitronium tetrafluoroborate. Acetonitrile, Ammonium carbonate. Potassium carbonate. Diethyl ether, Acetone, Ethyl acetate. Butanol Sulfamic acid, Potassium hydroxide. Ethanol, Nitric acid, Sulfuric acid, Acetone, Isopropyl alcohol Dioxane, Potassium nitrite. Potassium bicarbonate, Tetranitromethane Lead acetate, Sodium azide Sodium azide, Lead acetate. Water... 

The chloride, [Co(NH3)4(N02)2]Cl, is formed in the same way by the addition of ammonium chloride. It crystallises in dull yellow rectangular plates or in needles which are very soluble in water. It may also be prepared from chloro-aquo-tetrammino-cobaltie chloride by treating it with sodium nitrite and acetic acid. 

Potassium Tetranitrito - diammino - cobaltate, [Co(NH3)3 (N02)4]K.—The salt is produced by treating cobaltous chloride with excess of ammonium chloride and potassium nitrite, and warming the liquid to 50° C. It is then allowed to stand at low temperature for several hours, when crystals separate. They are dissolved in boiling water, filtered. and cooled, when lustrous browm rhombic crystals separate. The salt may be obtained from the ammonium salt by treating a warm aqueous solution with potassium acetate. 

Diazotization has been reported for all the pyrazolopyridines, and in some cases the salts have been isolated. A 7-aminopyrazolo[4,3-c]pyridine (191a) was converted to the corresponding hydroxy compound with sodium nitrite in hot glacial acetic acid.159 Analogous products were obtained from a 3-aminopyrazolo[3,4-b]-15 and 2-aminopyrazolo[l,5-a]pyridine.186 Decomposition of diazonium salts with hydrobromic acid afforded 3-bromo-pyrazolo[3,4-c]-u0 or -[4,3-bjpyridines111 deamination of 3-aminopyra-zolo[3,4-h]pyridines was achieved via treatment of the diazonium salts with hypophosphorous acid,10 titanous chloride,238 or ferrous ammonium sulfate.238 Kocevar et al.236 have made a detailed study of the reactions of the latter diazonium salt. 

As long ago as 1896 Walther [43] observed that as the result of chemical reaction between ethyl nitrate and phenylhydrazine at an elevated temperature, aniline, ammonium nitrate and nitrogen are formed. If the reaction takes place in the presence of sodium ethoxide then, according to Bamberger and Billeter [44] even at room temperature nitrite ions, nitrogen, benzene, phenyl azide, azobenzene, nitrobenzene, aniline, acetic acid and acetaldehyde are formed. 

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