Mercury sulfates

Benzisoxazole and alicyclic ketones undergo a mercury sulfate-catalyzed cycloaddition in boiling xylene. The enol tautomers (141) are apparently involved and the yields of... 

The a-CF2 in perfluoro(A-alkylcyclic amines) can be hydrolyzed with oleum, and mercury sulfate as catalyst, to yield perfluorolactams [88JFC(41)213],... 

Krabbeiihoft DP, Orem W, Aiken G, Gilmour CG. 2004. Unraveling the complexities of mercury methylation in the Everglades the use of mesocosms to test the effects of new mercury, sulfate, and organic carbon. Proc 7th Int Conf Mercury Pollut, RMZ-MG, 51(l-3) June2004. 

Sapper An obsolete process for making phthalic anhydride by oxidizing o-xylene, using a mercury sulfate catalyst. Invented by E. Sapper in 1891 in the course of searching for a commercial route to indigo, and used until the catalytic gas-phase oxidation of naphthalene was introduced in 1925. 

Fig. 11.7 Parallel voltammetric screening of 64 Pt thin film catalysts for the electroreduction of oxygen in acidic solution. In the kinetically controlled region, the activity of all 64 catalysts shows good reproducibility. Conditions 0.5 M H2S04, oxygen saturated 20 mV s 1 anodic scan rate, 60°C, electrolyte stirring, potentials are plotted on the mercury/mercury sulfate electrode scale. Inset voltammogram of 64 Pt thin film catalysts in oxygen-free sulfuric acid, 20 mV s-1, prior to oxygen screening.

Marie-Davy cell — This was a -+ Bunsen cell with a carbon electrode in a paste of mercury sulfate, i.e., it was a zinc-mercury - battery. 

A mercury-sulfate electrode served as a reference electrode. All electrode potentials are referred to the potential of the reversible hydrogen electrode in the same electrolyte and at the same temperature as the test electrode. Adsorption measurements were performed in the 0.5 M H2SO4 solution prepared using special purity B-5 sulfuric acid and water doubly-distilled. To remove oxygen dissolved in the electrolyte, pure helium or argon was bubbled through acid solution. 

SYNS ARETAN-NIEinOC B 4992 BIS-(METHYD MERCURY)-SULFATE BIS-(METHYLMERKURI)-SULFAT CERESAN UNIVERSAL-FEUCHTBEIZE CEREWET COMPOUND-4992 MERCURY, SULFATOBIS(METHYL- METHYLMERCURIC SULFATE SULFURIC ACID, BIS(METHYLMERCURY) SALT... 

The first vinyl ester prepared was vinyl acetate, in 1912, by homogeneous mercury sulfate catalysis [29]. For the vinyl esters of lower carboxylic acids, the reaction was soon carried out in the gas phase over, for example, zinc salts of the corresponding carboxylic acids (such as zinc acetate) heterogenized on active charcoal [30]. By 1965, vinyl acetate was prepared almost exclusively by this method. Since then, this synthesis has been largely superseded by the ace-toxylation of ethylene, the petrochemical preparation of which is highly economic (Section 2.1.4.1). 

Weston cell. An electrical cell used as a standard that consists of an amalgamated cadmium anode covered with crystals of cadmium sulfate dipping into a saturated solution of the salt, and a mercury cathode covered with solid mercury sulfate. 

The function of the central electrode is to facilitate the exchange of sulfate ions between the two solutions. The equilibrium associated with a single mercury mercury sulfate electrode is... 

Reagent grade chemicals were utilized. Electrodeposition was carried out in a conventional three-electrode cell under potentiostatic control with a mercury sulfate electrode as reference (in the following, all potentials are quoted versus this reference) and a platinum wire as counter electrode. Solutions were stirred and deoxygenated by bubbling nitrogen. Backside ohmic contacts of Si samples were achieved with an InGa eutectic. The i-U characteristics of the solid state junctions were measured in air. 

The formation of acridine in the reaction of benzyne with anthranil is thought to be a stepwise rather than a concerted (4 + 2)-cycloaddition.221 More interesting are the mercury sulfate-catalyzed cycloadditions of alicyclic ketones to anthranil in boiling xylene, which appear to involve the enol tautomers as indicated in Eq. (10).2 22 The yields of 2,3-cycloalkanoquinolines (163) range from 11% (n = 4) to 39% (n = 5). Phenylacetylene and diethyl maleate yield similar products. 

EINECS 231-992-5 HSDB 1247 Mercuric bisulphate Mercuric sulfate Mercuric sulphate Mercurous bisulphate Mercury bisulfate Mercury disulfate Mercury persulfate Mercury sulfate (HgSOk) Mercury sulphate Mercury(ll) sulfate Mercury(ll) sulfate (1 1) Sulfate mercurique Sulfuric acid, mercury(2- ) salt (1 1). Catalyst in the conversion of acetylene to acetaldehyde, extracting gold and silver from roasted pyrites, battery electrolyte. Solid dec 450 d = 6.47 reacts with H2O LDm (rat orl) n 57 mg/kg. Atomargic Chamatals Lancaster Synthesis Co. Noah Cham. 

Basic mercuric sulfate EINECS 215-191-8 HSDB 1188 Mercuric basic sulfate Mercuric subsulfate Mercury oxide sulfate Mercury oxide sulfate (Hg302(S04)) Mercury oxonium sulfate Mercury sulfate, basic Queen s yellow Trimercury dioxide sulphate Turpeth miheral. Mercuric subsulfate, a yellow basic sulfate of mercury. Solid insoluble in H2O. 

Nef92 obtained dibenzoylmethane by the action of concentrated sulfuric acid on benzoylphenylacetylene, and numerous other /3-diketones have been synthesized by this method.93 Benzoylacetylene is unaffected by concentrated sulfuric acid at 20° and decomposes therein at higher temperatures in dilute sulfuric acid containing mercury sulfate at 80-100° it affords 1-phenyl-1,2-propanedione 94... 

N-Sulfuric acid (50 ml) containing mercury(n) sulfate (0.25 g) is added to a solution of benzoylacetylene (6.5 g) in ethanol (100 ml). The mixture is stirred on a boiling water-bath for 6 h during which further mercury sulfate (0.25 g) in 2N-sulfuric acid is gradually added. Isolation by means of ether gives 1-phenyl-1,2-propanedione (4.1 g) as a yellow oil, b.p. 88°/17 mm, nD17 1.5350. 

Hydroxy-3-methyl-2-butanone is formed in good yield from 2-methyl-3-butyn-2-ol and mercury sulfate in an excess of dilute sulfuric acid.96... 

Ethynylcyclohexanol is hydrated to 1-hydroxycyclohexyl methyl ketone by use of an ion-exchange resin treated with 1% mercury sulfate solution 88 hydroxyacetone has been synthesized analogously from propargyl alcohol 88a... 

Dowex 50 ion-exchange resin is treated with a solution of mercury sulfate in dilute sulfuric acid, then carefully washed and dried. This resin (2 g) is added, with stirring, to a solution of propargyl alcohol (10.4 g, 0.2 mole) in water (100 ml) the temperature rises to 55° within 13 min, The mixture is stirred for 25 min at 50° and subsequently at 40°. After 100 min the resin is filtered off and washed with water (20 ml). An aliquot part (12 ml) of the solution is treated with phenylhydrazine, giving hydroxyacetone phenylhydrazone (2.85 g, 87%), m.p. 99-101DC. 

Human activities have resulted in the release of a wide variety of both inorganic and organic forms of mercury. The electrical industry, chloro-alkali industry, and the burning of fossil fuels (coal, petroleum, etc.) release elemental mercury into the atmosphere. Metallic mercury has also been released directly to fresh water by chloro-alkali plants, and both phenylmer-cuiy and methylmercury compounds have been released into fresh and sea water -phenylmercury by the wood paper-pulp industry, particularly in Sweden, and methyl-mercury by chemical manufacturers in Japan. Important mercury compounds which also may be released into the environment include mercury(II) oxide, mercury(II) sulfide (cinnabar), mercury chlorides, mer-cury(II) bromide, mercury(II) iodine, mer-cury(II) cyanide, mercury(II) thiocyanate, mercury(II) acetate, mercury nitrates, mercury sulfates, mercury(II) amidochloride monoalkyl- and monoarylmercury(II) halides, borates and nitrates dialkylmercury compounds like dimethylmercury, alkoxyal-kylmercury compounds or diphenylmercury (Simon and Wiihl-Couturier 2002) (for quantities involved, see Section 17.4). 

HN03[g] NITRIC ACID (GAS) 795 HgS04 MERCURY SULFATE 832... 

Anthraquinone-l-sulfonate (Potassium Salt). The quinone is sulfonated with 20 per cent oleum in the presence of mercury sulfate catalyst. To ensure maximum yield, only 40 per cent of the starting material is reacted. 

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