Antimony III Iodide Sulfide

The procedure is described in detail, therefore, for one example, antimony(III) iodide sulfide. 

The conditions for the preparation of this compound are given in Table VI, Sec. F. 

The volume of the silica ampul which serves as the reaction vessel (Fig. 17) is measured, to the constriction, with a graduated buret. After subtracting the volume of the starting materials from the total volume of the ampul, the degree of fill can be determined (see Tables II-IV).  

Ten grams (0.03 mole) of antimony(III) sulfide is poured into the ampul with the aid of a suitable funnel. After the inside of the constriction has been cleaned with a cotton plug, the ampul is connected to a vacuum system, evacuated, and sealed off. During this operation the level of the liquid nitrogen should be corrected from time to time to avoid thawing of the acid, which would immediately react with the antimony(III) sulfide. 

The sealed ampul is transferred from the liquid nitrogen and is placed immediately under running hot water until a film of liquid acid has formed on the inner wall of the ampul. In this way bursting of the ampul due to the increase in volume of the melting acid is avoided. The ampul is then kept in a hood until the acid is completely liquid. Caution. A heavy face shield should be worn during this operation. 

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The furnace is subjected to a temperature/time treatment according to the specifications given in the tables for the respective compound. For the preparation of antimony(III) iodide sulfide, the furnace is cooled uniformly from 480-250°C. for a period of 10 days. ... 

The compounds have been of interest because of their physical properties. They are both photoconducting and ferroelectric. Antimony(III) iodide sulfide has a Curie point at 22°C.12... 

The treatment of sulfoxides with DAST in the presence of a Lewis acid, e.g. antimony(III) chloride or zinc(II) iodide, results in the formation of a-fluoroalkyl sulfides (see Table 9).65 69 Sulfides are also converted to the corresponding a-fluoroalkyl sulfides upon treatment with DAST or DAST antimony(III) chloride (see Table 9).70... 

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