136448-74-3

Basic information

• Product Name: selenium sulfur dibromide
• Synonyms: selenium sulfur dibromide
• CAS NO: 136448-74-3
• Molecular Weight: 270.834
• Mol File: 136448-74-3.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: selenium sulfur dibromide(CAS DataBase Reference)
• NIST Chemistry Reference: selenium sulfur dibromide(136448-74-3)
• EPA Substance Registry System: selenium sulfur dibromide(136448-74-3)

Safety Data

• Hazardous Substances Data: 136448-74-3(Hazardous Substances Data)

Upstream product

• 10025-67-9 disulfur dichloride 
• 1015938-55-2 diselenium dibromide 

Relevant articles and documents

Exchange processes in diselenium and selenium-sulfur dihalides, Se2X2 and SeSX2 (X = Br, Cl). A 77Se 2D-EXSY study

The application of two-dimensional NMR exchange spectroscopy (2D-EXSY) to the study of 77Se exchange kinetics in mixtures of S2Cl2 and Se2Br2, which contain disulfur, diselenium, and selenium sulfur dihalides, shows that 77Se magnetization transfer takes place predominantly by an exchange process, in which only SeX bonds are broken. Direct exchange via mechanisms, involving ChX radicals, four-chalcogen center transition states and mono- and trichalcogen dihalide species are not consistent with the cross peaks observed in the 2D spectra. Magnetization transfer by means of a bimolecular halogen-bridged intermediate (Chemical Equation Presented) or by an ionic process, involving Se-X bonds, are both consistent with the pattern of cross observed. However, the addition of tetraethylammonium chloride to the S2Cl2/Se2Br2 mixture causes the eight-signal spectrum to collapse to three broad signals, which favors an interpretation in terms of an ionic exchange mechanism. The three broad signals are assigned to BrSSeX, ClSSeX, and SeSe dihalides each undergoing rapid ionic exchange, involving SeX bonds.