Lead chloride thiocyanate

Lanthanum nitrate, analysis of anhydrous, 5 41 Lead (IV) acetate, 1 47 Lead(II) 0,0 -diethyl dithiophos-phate, 6 142 Lead (IV) oxide, 1 45 Lead(II) thiocyanate, 1 85 Lithium amide, 2 135 Lithium carbonate, formation of, from lithium hydroperoxide 1-hydrate, 5 3 purification of, 1 1 Lithium chloride, anhydrous, 6 154 Lithium hydroperoxide 1-hydrate, 5 1... 

Neurotoxic chemicals and motor neuropathy Chlorpyrifos, dichlorvos (DDVP), EPN, n-hexane, 2-hexanone, lead, lead chromate, lead II thiocyanate, leptophos, methamidophos, mipafox, omethoate, parathion, trichlor-fon, trichloronate, triorthocresyl phosphate Neurotoxic chemicals and sensorimotor neuropathy acrylamide, allyl chloride, arsenic and compounds, arsenic trichloride, calcium arsenate, carbon disulfide, dichloroacetylene, ethylene oxide, gallium arsenide, lead arsenate, mercuric chloride, mercuric nitrate, mercurous nitrate, mercury, nitrous oxide, phenyl arsine oxide, thallium and soluble compounds, thallous nitrate... 

Thiocyanogen chloride, C1SC=N. A solution of the reagent is prepared by adding 1 mole of lead thiocyanate, Pb(SCN)2, mol. wt. 323.38 (Fisher supplies practical grade) to a solution of 2 moles of chlorine in acetic acid and filtering off the lead chloride. 

Silver chloride Cuprous iodide Cuprous thiocyanate Lead chloride Cuprous chloride... 

Cathode Silver chloride Lead chloride Cuprous iodide Cuprous thiocyanate Cuprous chloride"... 

The solution should be free from the following, which either interfere or lead to an unsatisfactory deposit silver, mercury, bismuth, selenium, tellurium, arsenic, antimony, tin, molybdenum, gold and the platinum metals, thiocyanate, chloride, oxidising agents such as oxides of nitrogen, or excessive amounts of iron(III), nitrate or nitric acid. Chloride ion is avoided because Cu( I) is stabilised as a chloro-complex and remains in solution to be re-oxidised at the anode unless hydrazinium chloride is added as depolariser. 

Re(VII), Mo(VI) and V(V) cations are detected by first spraying the chromatogram with tin(II) chloride solution (10% in 6 N hydrochloric acid) and then with ammonium thiocyanate solution (S0% in water). This leads to the formation of orange, pink or yellow-colored complexes [2]. 

Condensation of N-perchloroethenylbenzimidoyl chlorides 13 with S-alkylisothiuronium iodides leads to the formation of 4,6-disubstituted 2-alkylthio-l,3,5-triazines 14 in high yields. Their TV-alkyl isomers 15 are synthesized by successive treatment of chlorides 13 with strong basic primary amines and sodium thiocyanate <99MI996>. 

A. Phenylacetyl isothiocyanate. Twenty-five grams (0.16 mole) of phenylacetyl chloride (Note 1), 100 ml. of benzene, and 53 g. (0.16 mole) of lead thiocyanate (Note 2) are placed in a 1-1., three-necked, round-bottomed flask equipped with a mechanical stirrer and a reflux condenser. The stirrer is started and the mixture is refluxed for 5 hours. A small amount of activated charcoal is added, and refluxing is continued for 5 minutes. The warm mixture is filtered through a Buchner funnel under suction (Note 3), and the solid on the filter is washed with two 50-ml. portions of benzene. The solvent is removed from the filtrate under reduced pressure, and the residue is distilled at once to yield 17.5— 22.7 g. (61-79%) of phenylacetyl isothiocyanate, b.p. 83-91° at about 0.3 mm. It is a colorless liquid that rapidly darkens on standing (Notes 4 and 5). 

Cla]Cl, is prepared by leading chlorine gas into an aqueous suspension of frans-ditliiocyanato-cliromic thiocyanate, the mixture being kept cool. A green crystalline compound separates consisting of the acid sulphate and b/ms-dichloro-ehloride. Tliis is transformed into the chloride by treatment with concentrated hydrochloric acid, an acid chloride being first formed. 

If the ratio be unity, the concentrations of the solute in each solvent will be the same if the ratio be far removed from unity, a correspondingly large proportion of the solute will be found in the one solvent which can be utilized to extract the Soln. from the other solvent. E.g. ether will remove ferric chloride from its aq. soln., and since many other chlorides are almost insoluble in ether, the process is utilized in analysis for the separation of iron from the other elements the solubility of cobalt thiocyanate in ether is utilized for the separation of cobalt perchromic acid is similarly separated from its aq. soln. by ether molten zinc extracts silver and gold from molten lead the extraction of organic compounds from aq. soln. by shaking out with ether or other solvent is much used in organic laboratories. 

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