Aliphatics mercury salts

The present procedure2 describes the conversion of resin-bound, primary aliphatic amines into isothiocyanates and the conversion of the latter into 3-aminothiophenes. The generation of isothiocyanates is related to known procedures,3 in which amines are first treated with carbon disulfide and the resulting dithiocarba-mates are desulfurized by treatment with a condensing agent (alkyl chloroformates, carbodiimides, lead or mercury salts, etc.). The presence of resin-bound isothiocyanates on the polystyrene support could be qualitatively ascertained by infrared spectroscopy (KBr-pellet strong absorption at 2091 cm-1). 

Mercury salts can react directly with hydrocarbons exchanging hydrogen for mercury. This reaction is an electrophilic substitution (equation 5) and hence can take place with arenes, cyclopentadienyls, terminal aUcynes, and also with aliphatic hydrocarbons that contain activated carbon-hydrogen bonds (e.g. carbonyl or nitrile compoimds). When the hydrocarbon contains several equivalent hydrogen atoms, polymercuration is often observed. 

Decarboxylation of an aliphatic acid to the hydrocarbon is best effected by the so-called salt degradation method. That method is to treat the silver or mercury salt of, preferably, an aliphatic or alicyclic carboxylic acid with bromine in an inert solvent a halogenated hydrocarbon is then formed, together with carbon dioxide and the metal bromide, usually in an exothermic reaction, and the bromine can then usually be readily removed either cata-lytically or by means of a Grignard reagent (the Hunsdiecker reaction) ... 

Since 17a-ethynyl-17 -hydroxy steroids are so readily prepared, they represent attractive starting materials for conversion to 20-ketopregnanes. Standard methods for the hydration of aliphatic acetylenes (e.g, mercuric salts alone, with aniline, or with BF3) give variable results, and sometimes no product at all, due to D-homo rearrangement. 233,235,265-7 mercury... 

Carbon dioxide Sulfur dioxide Aliphatic hydrocarbons Aromatic hydrocarbons Cholinesterase inhibitors Paraquat Lead Arsenic Mercury Removal from exposure and administer oxygen Removal from exposure Removal from exposure Removal from exposure Atropine, pralidoxime Gastric lavage and dialysis Dimercaprol, penicillamine Dimercaprol, penicillamine Dimercaprol (elemental), penicillamine, dimercaprol (inorganic salts)... 

The majority of aliphatic ketones give the secondary alcohol on reduction at electrodes of carbon, mercury, lead, or platinum. The usual choice of electrolyte has been dilute sulfuric acid, acetate buffer, or a neutral salt solution, which will become alkaline during the course of reaction that consumes protons. Relatively few studies have been recorded of the isomer ratio obtained by reduction of open chain ketones with a prochiral center adjacent to the carbonyl function [32,33]. Results are collected in Table 2, and one aromatic carbonyl compound is included here for convenience. In general, the erythro-alcohol is favored and in an excess over that present in the equilibrium mixture [32,33]. These results are explained in terms of adsorption of intermediates at the electrode surface. For many of the examples in Table 2, the total yield of alcohol is low and this result is not generally typical of aliphatic carbonyl compounds, as can be seen from Table 3. 

The thiophenols are liquids of unpleasant odours the higher members of the series are solids. Like the mercaptans of the aliphatic series, they form difficultly soluble salts with lead and mercury. 

SULFUROUS ACID, SODIUM SALT (7757-83-7) React with water, steam, or acids, forming corrosive acid solution and sulfur oxide fumes. Incompatible with oxidizers, lead diacetate, mercury(I) chloride, alkalis, ammonia, aliphatic amines, alkanolamines, alkylene oxides, amides, epichlorohydrin, organic anhydrides, isocyanates, vinyl acetate. 

He showed that sodium salts of aliphatic primary and secondary nitrocompounds react with acids to form carbonyl compounds 2R2CHNO2 = 2R2C0+N2O+ H2O. Nef supported the theory of bivalent carbon. In the preparation of the explosive mercuric salt of nitromethane, he found that mercury fulminate is formed and regarded fulminic acid as C N OH, the reaction being Hg(CH2 N0 0)2==Hg(0-N C)2 + 2H20. He prepared the explosive addition compound of fulminic acid and hydrogen chloride, HON CHCl. In researches on acetylene compounds he prepared explosive di-iodoacetylene, IC-CI (he formulated it IgC.-C). He discovered the reaction between sodium acetylene and a ketone, followed by hydrolysis, to form an acetylenic carbinol ... 

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