593-79-3Relevant articles and documents
EIN EINFACHES VERFAHREN ZUR SYNTHESE VON I UND EMe2 (E = Se, Te)
Kuhn, N.,Faupel, P.,Zauder, E.
, p. C4 - C6 (1986)
Treatment of MeELi (E = Se, Te) with excess methyl iodide gives EMe3+ cations which are dealkylated by phosphanes PR3 (R = n-C4H9, C6H5) to give the dimethyl chalcogenides ER2 in good yields.
UV vapor generation for determination of selenium by heated quartz tube atomic absorption spectrometry
Guo, Xuming,Sturgeon, Ralph E.,Mester, Zoltan,Gardner, Graeme J.
, p. 2092 - 2099 (2003)
A new vapor generation technique utilizing UV irradiation coupled with atomic absorption for the determination of selenium in aqueous solutions is described. In the presence of low molecular weight organic acid solutions, inorganic selenium(IV) is converted by UV irradiation to volatile selenium species, which are then rapidly transported to a heated quartz tube atomizer for detection by atomic absorption spectrometry. Optimum conditions for photochemical vapor generation and interferences from concomitant elements were investigated. Identification of the volatile products using cryotrapping GC/MS analysis revealed that inorganic selenium(IV) is converted to volatile selenium hydride, selenium carbonyl, dimethyl selenide, and diethyl selenide in the presence of formic, acetic, propionic, and malonic acids, respectively. In acetic acid solution, the efficiency of generation was estimated to be 50 ± 10%. No interference from Ni2+ and Co2+ at concentrations of 500 and 100 mg L-1, respectively, was evident. A detection limit of 2.5 μg L-1 and a relative sensitivity of 1.2 pg L-1 (1% absorption) with a precision of 1.2% (RSD, n = 11) at 50 pg L-1 were obtained.
NEW ROUTE TO ORGANIC SELENIDES AND TELLURIDES
Korchevin, N. A.,Podkuiko, P. A.,Stankevich, V. K.,Deryagina, E. N.,Trofimov, B. A.
, p. 85 - 87 (2007/10/03)
A new simple and convenient synthetic route to organic chalcogenides R2Y (R = alkyl, allyl, benzyl; Y = Se, Te) is developed, which involves generation of Se2- and Te2- anions from Se and Te in the system KOH-hydrazine hydrate, where the latter plays the role of both the medium and reducing agent.Subsequent alkylation of the anions with the corresponding alkyl halides furnishes the target chalcogenides in almost 95percent yield.Alkyl chlorides react faster than alkyl bromides and alkyl iodides.
NEW ROUTE FOR THERMOLYSIS OF DIMETHYL DISELENIDE
Ostroukhova, L. A.,Korchevin, N. A.,Deryagina, E. N.,Voronkov, M. G.
, p. 1935 - 1936 (2007/10/02)
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