Sulfane solubility

The sulfanes are soluble in carbon disulfide, benzene, tetrachloromethane, and dry diethylether (decreasingly so in that order) while alcohols and aqueous systems initiate rapid decomposition. For this reason a report on the chromatographic separation of the sulfanes H2S by reversed-phase HPLC using methanol as an eluent [35] was shown to be in error The peaks observed in the chromatogram have to be assigned to bismethoxy oligosulfanes... 

A mixture of sulfanes (H S, n = 3, 4,... n = 6) known as crude sulfane reacts with both SeCl4 and Se Cl in carbon disulfide at low temperatures to form cyclic selenium sulfides of types Se Sg and Se Sj2 - On extraction and recrystallization from carbon disulfide a mixture of twelve-membered ring molecules was obtained as yellow crystals with a selenium content of up to 29 weight-% corresponding to the formula SOj 3. As this sample was much less soluble in CSj than both S,2 and compounds of type Se S8 , it could easily be separated from the latter. The twelve-membered ring molecules have so far been characterized by X-ray crystallography only (see 3.2). 

Such sulfinate compounds are water soluble and may be used as antiradiation drugs (see Section 7.4). Bis(sulfinato)trisulfanes may be converted to the corresponding bisalkyl esters by reaction with either diazomethane or a solution of BF3 in diethyl ether. When sodium polysulfide is apphed in equation (59) the resulting poly-sulfanes (equation 60) contain up to six sulfur atoms. However, bis(sulfinato)polysulfanes with more than four catenated sulfur atoms are unstable in water, and elemental sulfur is slowly precipitated. When the thiosulfonate RS(0)-(CH2)2-SS02C6H4Me was used in equations (59) and (60), the bis(sulfoxido)trisulfane [RS(0)-(CH2)2]2S3 resulted. ... 

Cellulose triacetate is soluble in several organic solvents. Methylene chloride or the mixed solvent of 9/1 methylene chloride-methanol by weight is used for preparing dopes of cellulose triacetate for spinning. Methanol enhances the solubihty of cellulose triacetate in methylene chloride. Cellulose triacetate is also soluble in chloroform, sym-tetrachloroethane, trichloroethanol, dimethylformamide, trioxane, sulfane, dimethylacetamide, formic acid, and acetic acid. 

Reduced chalcogens. Sulfane, H2S, gradually and incompletely precipitates black cobalt(II) sulfide, CoS , from solutions of Co from acetate solution the separation is fairly prompt and complete, but in the presence of strong acids, no precipitate forms. If, however, the cobalt is in NH3 solution, the reaction is rapid and complete. Alkali sulfides immediately and completely precipitate CoS , which is insoluble in excess of the reagent. At first the precipitate is distinctly soluble in dilute HCl, but upon standing 10 to 15 minutes, quite insoluble. The simple formula CoS represents the Co(OH)j (SH)2.j produced free of air. Air rapidly forms Co(OH)S, still acid-soluble, which, with more sulfide reagent, becomes a less soluble Co sulfide. 

Sulfane (H2S) and alkali sulfides precipitate Ag2S, black, from Ag. It is soluble in HNO3 (over 8 dM) (distinction fiomHg), soluble in CbT ... 

Reduced chalcogens. Sulfane, H2S, precipitates some of the Zn as ZnS, white, from solutions not too acidic with enough CH3CO2 to consume the H3O, precipitation is complete. Alkaline solutions of precipitate ZnS completely except for a small solubility in excess sulfide, although a large excess of NH3, OH" or Cl" etc. tends to inhibit the reaction. 

Reduced chalcogens. Sulfane (H2S) and precipitate, from shghtly acidic or alkahne solutions, CdS, yellow, insoluble in excess reagent, in NH3 or in CN (distinction from copper) soluble in 2-M HNO3, hot 3 to 4-M H2SO4, and in saturated NaCl (distinction from copper). 

Reduced chalcogens. Sulfane, H2S, added to a neutral or acetic-acid solution of In , precipitates a yellow 283, soluble in HsO" or S , partly soluble in hot (NH4)2S c, forming a white residue. Cooling gives a voluminous white precipitate. Sulfane passed into an alkaUne solution, or (NH4)2S added to a neutral solution of In , forms white Iu2S3. 

Reduced chalcogens. Sulfide and Ge precipitate a brown GeS. Sulfane (H2S) and Ge(OH)2 yield reddish-brown GeS, air-stable when dry, also formed in alkalis or weak acids, soluble in strong acids. Thus, stable in air, it is a good source for other Ge species. In contrast, Ge", with H2S, gives white GeS2 only from at least 6-M HsO". ... 

Sulfane, H2S, precipitates white GeS2, readily soluble in (NH4)2S . 

Sulfane, H2S, precipitates tin(IV) as SnS2, yellow, having generally the same solubilities as SnS except that SnS2 is moderately soluble in S. The following equations give some important reactions ... 

Reduced chalcogens. Sulfane does not affect Bi", but it precipitates from slightly acidified Bi a daik-brown Bi2S3, insoluble in cold, dilute HsO and alkali sulfides, but soluble in hot 2-M HNO3 (separation from Hg), in dilute H2SO4 (separation from Pb), and in hot concentrated HCl. Its insolubihty in (NH4)2S c separates it from Mo, Sn, As and Sb. 

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