17587-39-2Relevant academic research and scientific papers
Spectroscopic Characterization of the Selenium-Rich Heterocycles Se5S, Se7S, and 1,5-Se6S2
Steudel, Ralf,Papavassiliou, Maria,Baumgart, Frank
, p. 1674 - 1678 (2007/10/02)
Selenium Sulfides, HPLC, Raman Spectra, 77Se NMR Spectra, X-RaySe5S in CS2 solution at 20 deg C spontaneously decomposes to give a mixture of 8 selenium-rich cyclic molecules which have been identified by reversed-phase HPLC and 77Se NMR spectroscopy as Se6, Se7, Se8, Se6S, Se7S, 1,2-Se6S2, 1,5-Se6S2, and 1,4-Se4S2.NMR spectra of Se5S, Se7S, and 1,5-Se6S2 have been measured for the first time; Raman spectra of solid Se5S and Se7S as well as crystal data of Se7S are reported in addition.A mechanism based on nucleophilic attack on Se5S is proposed for the formation of the products.
Chromatographic Separation of Sulfur Containing Heterocycles of Type (CH2)nSm and SenS8-n by HPLC
Steudel, Ralf,Strauss, Eva-Maria
, p. 719 - 725 (2007/10/02)
The separation of a number of cyclic methylene sulfides and selenides by reversed-phase high-pressure liquid chromatography is reported.The retention times as well as the capacity factors depend in a systematic way on the ring size, the number and kind of chalcogen atoms, and the number of heteronuclear bonds within the ring.These relationships are used to assign the chromatograms of cyclic selenium sulfides of type SenS8-n (n=1-8) prepared in a new reaction from Se2Cl2, SCl2 and potassium iodide and containing all selenium atoms in neighboring positions.Keywords: HPLC, Methylene Sulfides, Methylene Selenides, Selenium Sulfides, Sulfur Heterocycles
