Carbon sulfide selenide

According to Hofman-Bang carbon sulfide selenide, CSSe, catalyzes the iodine-azide reaction but is at the same time decomposed with the formation of selenium. Experiments, in both this laboratory and that of Hofman-Bang have shown that carbon diselenide reacts with sodium azide (in aqueous or aqueous-alcoholic solution) with immediate precipitation of red selenium even at — 20° C. //a selena-triazole is formed in this reaction it must be extremely unstable. 

Selen-saure, /. selenic acid, -saureanhydrid, n. selenic anhydride (SeOa). -schlamm, m. selenium mud, selenium slime (seleniferous sulfuric acid works). -schwefel, m. Min.) selensulfur. -schwefelkohlenstoff, m. carbon sulfide selenide, CSSe. -silber, n. silver selenide. -silberglanz, m. naiimannite. 

The carbon diselenide and carbon sulfide selenide complexes of platinum(0) can be synthesized from Pt(PPh3)3. Reaction of the compounds with chelating phosphines results in substitution of the triphenylphosphines (equation 541).1866 With COS the C,S-bonded compound Pt(COS)(PPh3)2 is formed from Pt(PPh3)3. The reaction can also be used to prepare the dithiocarbonato complex Pt(S2CO)(PPh3)2.1867... 

The theoretical section introduced divalent carbon(O) compounds as molecules CL2 where the ligand L is a ct donor. In principle this task can be fulfilled by various neutral group 15 compounds (N2, nitriles, amines, phosphanes, arsanes, etc.), neutral group 16 compounds (sulfides, selenides, etc.) as well as by divalent C(II) with a free pair of electrons at a carbon atom, such as isonitriles, NHCs, carbenes, CO, ylides, etc. The neutral and isolable compound C2PPh3 [14,15] may also serve as a donor L to stabilize a carbon atom. 

III) ions. Sm(III) can be reduced to Sm(II) under special conditions, but in solution it is rapidly oxidized to the + 3 state. With respect to the solid state, the halides (SmX2) and some chalogenides(II) (oxide, sulfide, selenide, and telluride compounds) have been obtained. SmEj, together with the oxide, hydroxide, carbonate, oxalate, and phosphate compounds are insoluble in aqueous solution. The halide, perchlorate, nitrate, and acetate compounds are water-soluble. 

With the beginning of application of the third-law method in 2002, the situation has been significantly improved. As a rule, the measurement error for the parameter E is lower than 2-3 kJ moP Approximately the same error applies to theoretical calculations of the molar enthalpy, A,.EE /i/. To date, reliable data on E parameters have been accumulated for several classes of substances [3-14]. Most of them (for oxides, nitrides, hydroxides, nitrates, sulfates, and carbonates) have been obtained by L vov and his colleagues (see Part III). For other reactants (P, As, Sb, azides, higher oxides, sulfides, selenides, ZnTe, and Bc3N2) the primary experimental data reported in the literature (Part III) were used for calculations of the E parameter by the third-law method. 

In all primary lithium cells, the negative electrode is made of metallic lithium. Thus, different types of lithium cells differ in the positive electrode material and in the type of electrolyte. A variety of oxidant materials was offered as the active material of the positive electrode. These included different oxides, sulfides, selenides, oxysulfides, oxychlorides, and some other substances perfluorinated carbon and sulfur. However, only a small number of electrochemical systems in the cells actually reached the industrial production stage. The electrochemical systems of the cells produced industrially are given in Table 11.1. This Table also presents the values of open circuit voltage (OCV) of these cells and the theoretical values of their energy density. 

The most important are oxides, sulfides, selenides, and chromate compounds of metals, mainly Zn, Ti, Cd, Cr, Ni, Co, Pb, Mo. Carbon black is also often included into this group. They have high thermostability and good dispersibility in PR... 

Bina Selenides. Most biaary selenides are formed by beating selenium ia the presence of the element, reduction of selenites or selenates with carbon or hydrogen, and double decomposition of heavy-metal salts ia aqueous solution or suspension with a soluble selenide salt, eg, Na2Se or (NH 2S [66455-76-3]. Atmospheric oxygen oxidizes the selenides more rapidly than the corresponding sulfides and more slowly than the teUurides. Selenides of the alkah, alkaline-earth metals, and lanthanum elements are water soluble and readily hydrolyzed. Heavy-metal selenides are iasoluble ia water. Polyselenides form when selenium reacts with alkah metals dissolved ia hquid ammonia. Metal (M) hydrogen selenides of the M HSe type are known. Some heavy-metal selenides show important and useful electric, photoelectric, photo-optical, and semiconductor properties. Ferroselenium and nickel selenide are made by sintering a mixture of selenium and metal powder. 

Both antimony tribromide and antimony ttiiodide are prepared by reaction of the elements. Their chemistry is similar to that of SbCl in that they readily hydroly2e, form complex haUde ions, and form a wide variety of adducts with ethers, aldehydes, mercaptans, etc. They are soluble in carbon disulfide, acetone, and chloroform. There has been considerable interest in the compounds antimony bromide sulfide [14794-85-5] antimony iodide sulfide [13868-38-1] ISSb, and antimony iodide selenide [15513-79-8] with respect to their soHd-state properties, ferroelectricity, pyroelectricity, photoconduction, and dielectric polarization. 

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