Silver chloride tartrate

Details of the simple resolution of the racemic chloride by means of silver d-tartrate or barium d-tartrate are given... 

Tris (ethylenediamine) cobalt (III) chloride was first prepared by Werner.1 Resolution was effected through the chloride d-tartrate which was obtained by allowing the chloride (1 mol) to react with silver d-tartrate (1 mol). The correct ratio of chloride ion to tartrate ion is important and this has meant that it was necessary to isolate the pure solid chloride, the synthesis of which has been described by Work.2 In the present method the less soluble diastereo-isomer is isolated directly and the expensive and unstable silver d-tartrate is replaced by barium d-tartrate. The addition of activated carbon ensures rapid oxidation of the initial cobalt (II) complex and eliminates small amounts of by-products of the reaction. 

Lingane found that (14-24) is obeyed in the deposition of copper onto a platinum cathode from a tartrate solution and in the deposition of lead and reduction of picric acid at a mercury cathode. Lingane and Small found the same type of relation in the anodic formation of silver chloride. 

Separation of Pd with a collector. To the sample solution (-100 ml) in 0.1 M HCl, containing not more than 50 pg of Pd and heated to 80°C, add a macerated filter paper and 1 ml of 5% oxalic acid solution. Keep the solution at 80°C for 1 h, then allow it to cool. Filter off the precipitate of elemental gold and silver chloride together with the paper. To the filtrate add successively 2 mg of nickel (as its sulphate solution), 2 ml of 20% potassium sodium tartrate solution [to mask Fe(IIl), Al, Ti, etc.], 2 g of sodium acetate, 1 ml of 0.1 A/ EDTA, and 2 ml of the H2Dm solution (pH -6.5). After 30 min, filter off the precipitate of nickel- and palladium dimethylglyoximates. Wash the precipitate from the filter paper into a beaker, add 1 ml of cone. HCl, and evaporate to 5-10 ml, depending on the quantity of Pd in the solution. 

Similar active salts are prepared through tartaric acid, in which case a solution of the chloride is treated with silver tartrate. 

Chlorides and Sulphates. — The solution of 1 gm. of potassium and sodium tartrate in 10 cc. of water, with 2 cc. of nitric acid added, should not be affected by silver nitrate and barium nitrate solutions. 

In fresh water, silver may form complex ions with chlorides, ammonium (in areas of maximum biological activity), and sulfates form soluble organic compounds such as the acetate and the tartrate become adsorbed onto humic complexes and suspended particulates and become incorporated into, or adsorbed onto, aquatic biota (Boyle 1968). Where decaying animal and plant material are abundant, silver strongly precipitates as the sulfide or combines with humic materials (Smith and Carson 1977). 

The interference of copper, nickel, cobalt, iron, chromium, and magnesium is prevented by adding sodium potassium tartrate to the test solution only silver (removed as silver iodide by the addition of a little KI solution) and mercury then interfere. Mercury is best removed by adding a little sodium potassium tartrate, a few crystals of hydroxylamine hydrochloride, followed by sodium hydroxide solution until alkaline the mercury is precipitated as metal. Tin(II) chloride is not suitable for this reduction since most of the cadmium is adsorbed on the mercury precipitate. 

The reaction is not disturbed by silver or copper, or by iron(III), chromium or aluminium in the presence of ammoniacal tartrate solution if zinc is present, ammonium chloride should first be added cobalt(III) ions represss the sensitivity and should be oxidized to the tervalent state with hydrogen peroxide iron(II) interferes and should be oxidized and alkaline tartrate solution added before applying the test. 

Cyanide solutions are used in the electroplating of gold, silver, zinc, cadmium, and other metals. In these solutions the concentrations of uncomplexed metal ions are very small, and this favors the production of a uniform fine-gTained deposit. Other complex-forming anions (tartrate, citrate, chloride, hydroxide) are also used in plating solutions. 

Coulometric determinations of metals with a mercury cathode have been described by Lingane. From a tartrate solution, copper, bismuth, lead, and cadmium were successively removed by applying the appropriate cathode potential, which was selected to correspond to a region of diffusion-controlled current determined from current-voltage curves with a dropping mercury electrode. With a silver anode, iodide, bromide, and chloride can be deposited quantitatively as the silver salt. By controlling the anode potential, Lingane and Small determined iodide in the presence of bromide or chloride. The separation of bromide and chloride, however, was not successful because solid solutions were formed (Section 9-4). 

Resolution 3t3-Acetoxy-A. etienic add. T-Acid from a tetranitrofluorenone and an optically active hydroxylamine. i><—>Butane-2,3-diol. L.(+)-Butane-2,3-dithiol. (By crystallization Silver acetate). 10-Camphorsulfonic acid. 10-Camphorsulfonyl chloride. 4-(4-Carboxy-phenyl) semicarbazide. Complex from ethylene, platinous chloride, and (- -)-l-phenyi-2-aminopropane. Debydroataetylamine. Diisopinocampheylborane. Di-p-toluoyl-o-tartrate. d- and /-u-Phenylethylamiiie. L-Pyrrolidonecarboxylic add. a-(2,4,S,7-Tetianitro-9-fluorenyl-ideneaminooxy)-propionic acids. 

NITRIC ACID, SILVER(I) SALT (7761-88-8) A powerful oxidizer. Forms friction- and shock-sensitive compounds with many materials, including acetylene, anhydrous ammonia (produces compounds that are explosive when dry), 1,3-butadiyne, buten-3-yne, calcium carbide, dicopper acetylide. Contact with hydrogen peroxide causes violent decomposition to oxygen gas. Violent reaction with chlorine trifluoride, metal powders, nitrous acid, phospho-nium iodide, red or yellow phosphorus, sulfur. Incompatible with acetylides, acrylonitrile, alcohols, alkalis, ammonium hydroxide, arsenic, arsenites, bromides, carbonates, carbon materials, chlorides, chlorosulfonic acid, cocaine chloride, hypophosphites, iodides, iodoform, magnesium, methyl acetylene, phosphates, phosphine, salts of antimony or iron, sodium salicylate, tannic acid, tartrates, thiocyanates. Attacks chemically active metals and some plastics, rubber, and coatings. 

Potassium sodium tartrate Potassium sodium, tartrate tetrahydrate Silver nitrate Stannous chloride anhydrous L-Tartaric acid silverplating... 

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