77Se-NMR and raman spectroscopic characterization of selenium dibromide (SeBr2) and its reaction with titanocene pentasulphide to give cyclic selenium sulphides of ring size 6, 7, 8, and 12
1990; Elsevier BV; Volume: 9; Issue: 9 Linguagem: Inglês
10.1016/s0277-5387(00)86896-5
ISSN1873-3719
AutoresRalf Steudel, Detlef Jensen, Frank Baumgart,
Tópico(s)Chalcogenide Semiconductor Thin Films
ResumoSelenium dibromide prepared from Se and SeBr4 in acetonitrile shows a singlet at 1496 ppm in the 77Se-NMR spectrum and Raman lines at 291, 265, and 105 cim−1. Selenium dibromide which is in equilibrium with Se2Br2 and Br2 reacts with titanocene-pentasulphide at 20°C in CS2 to give SeS5 which partly dimerizes to give 1,2-Se2S10 and 1,7-Se2S10. Raman spectra of Se2S10 and Se2S1O·CS2 are reported and their formation from SeS5 is discussed. Other products of the SeBr2-titanocenepentasulphide reaction are 1,2-Se2S5 (from Se2Br2), S1O (from Br2), 1,2-Se2S6, 1,5-Se2S6, and 1,2,5,6-Se4S4.
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