Metals ammonium

Sulfides All sulfides (except alkali metals. ammonium, magnesium, calcium, and bar-... 

Orthophosphate Hquid mixtures are ineffective as micronuttient carriers because of the formation of metal ammonium phosphates such as ZnNH PO. However, micronutrients are much more soluble in ammonium phosphate solutions in which a substantial proportion of the phosphoms is polyphosphate. The greater solubiHty results from the sequestering action of the polyphosphate. The amounts of Zn, Mn, Cu, and Fe soluble in base solution with 70% of its P as polyphosphate are 10 to 60 times their solubiHties in ammonium orthophosphate solution. When a mixture of several micronutrients is added to the same solution, the solubiHty of the individual metals is lowered significantly. In such mixtures the total micronuttient content should not exceed 3% and the storage time before precipitates appear may be much shorter than when only one micronuttient is present. 

Methylene chloride is easily reduced to methyl chloride and methane by alkaU metal ammonium compounds in Hquid ammonia. When the vapor is contacted with reduced nickel at 200°C in the presence of excess hydrogen, hydrogen chloride and elementary carbon are produced. Heating with alcohoHc ammonia at 100—125°C results in hexamethylenetetramine, (CH2) N4, a heterocycHc compound with aqueous ammonia at 200°C, hydrogen chloride, formic acid, and methylamine are produced. 

The chromate(VI) salts containing the tetrahedral CrO ion are a very important class of Cr(VI) compounds. Only the alkah metal, ammonium ion, and magnesium chromates show considerable water-solubiHty. Some cations, eg,, and, are so insoluble that they precipitate from... 

Fluoride ion sources include alkali metal, ammonium, tetraalkylammomum, and silver fluorides. With silver fluoride, the polyfluoroalkylsilver intermediates can be isolated [/, 37] (equation 6)... 

R.D. Stewart, Alkali Metal, Ammonium And Alkaline Earth Perchlorates" in J.C. Schumacher, Ed, Perchlorates, their Properties, Manufacture, and Uses", ACS Monograph 146, Reinhold, NY (1960), 29 11) F.A. Warren et... 

Apart from metals, ammonium chloride, amine, and diamine salts, and various organic polymeric dispersants and surfactants are employed in fuel treatment additive formulations. 

Brighteners are applied to cotton by methods similar to direct dyes. By far the most common are triazinyl derivatives of diaminostilbenedisulphonic acid (DAS) of general formula 11.5, where M is an alkali metal, ammonium or alkylammonium cation. Examples of groups Ilj and R2 are shown in Table 11.1. Most suppliers of FBAs market such compounds, often called DAST brighteners. Products in this class have sometimes been marketed because the supplier needed to offer something different for commercial reasons, or to avoid infringing a competitor s patent, rather than for any real technological necessity. 

See Nitryl fluoride Metals Ammonium nitrate Metals... 

Heavy metals Ammonium pyrro-lidinedithiocarbamate X-ray fluorescence - [945]... 

The p-t-butylcalix[4]arenediquinone-bis(methylether) [56], which had previously been synthesized by Gutsche and co-workers, was used as a model compound in these studies. The receptors [54] and [55] have been shown by nmr titration techniques to form 1 1 solution state complexes with group 1 and 2 metal, ammonium and alkylammonium guest species. 

Existing knowledge on perchloric acid and its salts was reviewed extensively in 1960 in a monograph including the chapters Perchloric Acid Alkali Metal, Ammonium and Alkaline Earth Perchlorates Miscellaneous Perchlorates Manufacture of Perchloric Acid and Perchlorates Analytical Chemistry of Perchlorates Perchlorates in Explosives and Propellants Miscellaneous Uses of Perchlorates Safety Considerations in Handling Perchlorates [1], There is a shorter earlier review, with a detailed treatment of the potentially catastrophic acetic anhydride-acetic acid-perchloric acid system. The violently explosive properties of methyl, ethyl and lower alkyl perchlorate esters, and the likelihood of their formation in alcohol-perchloric acid systems, are stressed. The instability of diazonium perchlorates, some when damp, is discussed [2],... 

Primary separation occurs in the leaching procedure, where the metals copper, zinc, and nickel are dissolved as metal ammonium chlorides or chloro complexes, while iron and chromium remain in the solid residue as hydroxides. 

The first step in the hydrometallurgical treatment is leaching the feed material with an ammoniacal solution. Metals such as copper, nickel, and zinc form metal ammonium complexes and will therefore dissolve in the leach solution. Other metals like iron and chromium form insoluble hydroxides and will be found in the residue. This residue is dried and treated in the induction converter. Copper and nickel are separated from the filtered leach... 

Usually, addition of an appropriate counterion, commonly an alkah metal, ammonium, or tetraalkylammonium permits the isolation of the polyanion. Lithium and sodium salts are generally more water-soluhle than those of the larger cations. In contrast, salts of alkylammonium and similar cations are insoluble in water but can be recrystaUized from several nonaqueous solvents. 

Ammonium, Metal(Metal Ammonium). Solutions of mercury arid the alkali metals in liq ammonia were first prepd and studied by Weyl (Ref 1). According to his views, the metals are joined to the nitrogen of ammonia, forming substituted ammonium radicals. Many investigators later studied the solns of metals in liq ammonia and while a few of the investigators were in favor of Weyl s theory(Joannis in 1892, Moissan in 1898 and Benoit in 1923), others were against it(Seeley in 1871, Ruff and Geisel in 1906, Kraus in 1908, Biltz in 1920 etc)... 

Kraus Johnson(Ref 2) reinvestigated the solns of lithium in liq ammonia and came to the conclusion that there is no evidence indicating that Li is joined to the nitrogen of ammonia, forming a substituted ammonium ion Note The compds formerly called "metal-ammoniums are now called amminesf,qv) or ammoniates ... 

Pu), for which alkali metal, ammonium and tetraalkylammonium salts are known. The salts Mi[Mvi02(N03)3] (Mvi = U, Np, Pu with M1 = K, Rb, Cs, NH4) are isostructural.247 The anion in Rb[Np02(N03)3] consists of a hexagonal bipyramidal arrangement of oxygen atoms about the neptunium atom, with six oxygen atoms from the bidentate nitrate groups in the equatorial plane. 8 The IR spectra of Rb[M I02(N03)3] (MVI = U, Np, Pu) have been reported. 9... 

Conditions of Exchange. To prepare the modified samples (Table I) ion exchange was done at 70° C with 0.1 N nitrate solutions of the metal (ammonium) ions. The degree of exchange was determined by analyzing the solid for the amount of sodium and exchanged metal ions remaining. 

A molecular compound is formed by the union of two or more already saturated molecules apparently in defiance of the ordinary rules of valence. The class includes double salts, sails with water of crystallization, and metal ammonium derivatives. These salts are usually formed by Van der Waals attraction between (he constituent molecules. They do nol differ in any characteristic manner from compounds formed in strict accordance with the concept of valence They are also called addition compounds. 

Metal ammonium. See Ammonium Metal A310-R Metaldehyde. See under Acetaldehyde A14-R Methanol-Aluminum (or Magnesium) Explosives A155-L... 

See Halogens or Interhalogens above Ammonium nitrate Metals Ammonium peroxodisulfate Iron Dinitrogen tetraoxide Metals Hydrogen peroxide Metals Nitryl fluoride Metals Peroxyformic acid Potassium dichromate Iron Potassium perchlorate Metal powders Sodium peroxide Metals... 

Ammonium salts of strong acids, such as NH4C1 or NH4N03, however, can lower the pH and encourage the hydrolysis of clays. Salts of weak acids, such as acetates, can, conversely, increase the pH with possible precipitation of metal hydroxides - an effect countered, however, by the complexation of metals by acetate. This complexation also inhibits the reabsorption of released metals. Ammonium acetate (1 moll-1, pH 7) has, therefore, been widely adopted as a soil extractant and recommended by a consortium of European experts for extractable metal trials under the auspices of Bureau Communautaire de Reference (BCR) of the European commission (Castilho and Rix, 1993 Ure et al., 1993a, b). 

Chablay E. Utilization of metal ammoniums in organic chemistry. Ann Chim 1914 9 469-519. 

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