Stannic acid sulfide

Zion-saum, m. list of tin, selvedge, -allure, /. stannic acid, -saureonhydrid, n. stannic anhydride, tin dioxide, -schlich, m. (Ores) tin slimes, fine tin. -schrei, m. = 2Unngeschrei. -seife, /. (Mining) stream tin. -soda, /. sodium stannate. -staub, m. tin dust, -stein, m. tinstone, cassiterite. -sulfid, n. tin sulfide, specif, stannic sulfide, tin(IV) sulfide. -BuUocyanid, 1. tin thiocyanate, specif. 

Besides hydrolysis, one can also utilize other exchange reactions in the preparation of disperse systems. It is, however, important to remember that a substantial amount of electrolyte, which is often present in the solution, may result in a loss of colloidal stability. One can sometimes remove excess electrolyte by washing and subsequent peptization of the precipitate. It is advantageous to prepare disperse systems at high supersaturations, which can be reached upon mixing concentrated solutions of reactants. The sols of Prussian Blue, various sulfides, stannic acid and its compound with colloidal gold (Cassian Purple) are all made by this method. 

Small amounts of antimony may be detected in the presence of much tin by means of Rhodamine B. In the course of systematic qualitative analysis, antimony chloride is always formed, together with stannic chloride, when the acid sulfides precipitated from alkaline sulfo solutions are dissolved in 1 1 hydrochloric acid. Hence oxidation to antimony is necessary. This is easily accomplished by sodium nitrite. 

Sodium phenoxide, 32, 75 33, 43, 45 Sodium sulfhydrate, 31, 7 Sodium sulfide nonahydrate, 31, 6 Sommelet reaction, 33, 93 Sorbic acid, S-hydroxy-0-methyl, 3-lactone, 32, 57 Stannic chloride, 33, 91 Stearone, 33, 84 ms-Stilbene, 33, 88 Irans-Stilbene, 33, 89... 

Sodium toluene dispersion of, 55, 65 Sodium p-toluenesulfinate, 57, 103 Spiro[4 n] alkenones, 58, 62 Spiro[cyclopentane-l,l -indene] 55, 94 Squalene, 56, 116 Squalene, 2,3-epoxy, 56, 116 Stannic chloride, 56, 97 Steroids synthesis, 58, 85 E Stilbene, 55, 115,58, 73 z-Stilbene, 58, 133 Styrene, 56, 35,58, 43 Styrene glycol, 55, 116 Styrene glycol dimesylate, 55, 116 Succinic acid, 58, 85 Succinic anhydride, 58, 85 Sucunimide, 56, 50, 58, 126 Succimmide, Vbromo, 55, 28, 56, 49 SULFIDE CONTRACTION, 55, 127 Sulfide, dimethyl-, 56, 37 SULFIDE SYNTHESIS, 58, 143,58, 138 SULFIDE SYNTHESIS ALKYL ARYL SULFIDES, 58, 143 SULFIDE SYNTHFSIS DIALKYL SULFIDES, 58, 143 SULFIDE SYNTHESIS UNSYMMETRI-CAL DIALKYL DISULFIDES, 58, 147 SULFONYL CYANIDES, 57, 88 Sulfur tetrafluoride, 57, 51... 

The usual routes to 1,3-oxazinium salts consist of 1,4-cycloadditions between either a,/3-unsaturated /3-chlorocarbonyl compounds and nitriles or between N-acylimidoyl chlorides and alkynes. Stannic chloride is an effective catalyst for both reactions (c/. Scheme 62). 1,3-Thiazinium perchlorates are synthesized by reacting oxazinium salts with hydrogen sulfide in absolute acetonitrile and then treating the product amides (185) with perchloric acid (Scheme 69) (72S333). 

Sodium Sulfide Sodium Sulfite Sodium Thiosuifate Sorbic Acid Stannic Chloride... 

Sommelet reaction, 33, 93 Sorbic acid, 5-hydroxy-/3-methyl, J-lactone, 32, 57 Stannic chloride, 33, 91 Stearic acid, 34, 15 Stearone, 33, 84 cis-Stilbene, 33, 88 fraws-Stilbene, 33, 89 Stirrer, for caustic fusion, 30, 104, 105 seal for, 30, 54 Stobbe condensation, 30, 18 Styrene, 33, 72 34, 85 reaction with sulfuric acid, 35, 83 Styrene dibromide, 30, 73 Styrene oxide, 31, 3 0-Styrenesulfonyl chloride, 34, 85 Succinic acid, 34, 44 Succinic acid, < -benzhydrylidene-, a-ETHYL ESTER, 30, 18 CLNNAMYL-, 31, 85 DIPHENYL ESTER, 34, 44 HEPTANOYL-, DIETHYL ESTER, 34, 51 PHENYL-, 30, 83 Succinic anhydride, 34, 40 SUCCINONITRILE, a, -DIPHENYL-, 32, 63 Sulfide, methyl 2-thienyl, 35, 85 Sulfonation of styrene, 34, 85 Sulfonyl chloride, from sodium sulfonate, 34, 85... 

Stannic sulfide (SnS2) maybe precipitated esseiitially quantitatively by addition of H2S to acid solutions of stannic salts. The acid concentration range in which complete precipitation may be achieved is fairly broad, provided that no strong tin complexes are formed with the acid. Li H2SO, for... 

Oxalate ion has probably been used more than any other complexing agent to inhibit the precipitation of stannic sulfide. Its use is sharply dependent on acid concentration, however, and markedly different results may be... 

Dey and Bhattacharya have reported that oxalate salts are more effective than oxalic acid in inhibiting precipitation of stannic sulfide and that the degree of inhibition decreases with time. Their data are reproduced in Tables 3 and 4. The authors made no attempt to control the pH of their solutions, but from the data they give the solutions were approximately 0.1-0.3JM in or on the steepest portion of the curve between A and B in Fig. 5. It is doubtful, therefore, that any credence can be given to the relative com-plexing powers of oxalate vs oxalic acid shown in Tables 3 and 4. At a given... 

Add about 0. 1 g of boric acid to the supernate followed by 0.3 ml of 6M hydrochloric acid, (N, B, the reaction between ammonium binuoride and boric acid results in the pH rising sufficiently to prevent precipitation of stannic sulfide. Hydrochloric acid is therefore added to neutralize this alkalinity.) Warm to dissolve the boric acid and pass more hydrogen sulfide to ensure complete precipitation of stannic sulfide Centrifuge and wash the precipitate twice with 0 2M hydrochloric acid. 

Dissolve the stannic sulfide in 0.2 ml of concentrated hydrochloric acid, heat in boiling water and pass a current of air for a few minutes to remove hydrogen sulfide. Dilute to about 1.5 ml and make ammoniacal. Centrifuge off the stannic hydroxide and dissolve it in 0.1 ml of 6M hydrochloric acid. Dilute to 0.3-1 ml as appropriate, and prepare sources on distrene, adding 2 drops of 3M hydrofluoric acid before evaporating to prevent volatilization of tin. 

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