10025-68-0Relevant articles and documents
New cluster-type rhodium selenochlorides in oxidative carbonylation of methane
Volkov,Khar'kova,Fokina,Yanko,Strizhak,Kosmambetova,Gritsenko,Korduban
, p. 193 - 200 (2007)
New rhodium selenochlorides Rh4Se16Cl10 and Rh4Se18Cl10 whose structure is based on the cluster "cubane" [Rh4(μ3-Se)4] and products of their thermal transfo
A simple method for the preparation of selenopheno[3,2-b] and [2,3-b]thiophenes
Arsenyan, Pavel
, p. 2527 - 2529 (2014)
A simple strategy for the preparation of novel selenopheno[3,2-b] and [2,3-b]thiophenes by treatment of ethynylthiophenes with selenium(I), (II), and (IV) chlorides and bromides is elaborated.
Selenium chlorides in the domino process of the regiospecific allyl chlorination of betulin and diacetylbetulin
Bodrikov,Kurskii, Yu. A.,Chiyanov,Subbotin, A. Yu.,Shavirin,Anderson
, p. 280 - 292 (2020)
The interaction of betulin and diacetylbetulin with selenium chlorides occurs regiospecific with allylic chlorination of the substrate. Selenium chlorides are obtained by chlorination of selenium with sulfuryl chloride in the form of a mixture of SeClsub
Synthetic applications of (Me3SiNSN)2E (E = S, Se) in chalcogen-nitrogen chemistry: Formation and structural characterization of CI2TeESN2 (E = S, Se) and [PPh4] 2[Pd2(μ-Se2
Konu, Jari,Ahlgren, Markku,Aucott, Stephen M.,Chivers, Tristram,Dale, Sophie H.,Elsegood, Mark R. J.,Holmes, Kathryn E.,James, Sarah L. M.,Kelly, Paul F.,Laitinen, Risto S.
, p. 4992 - 5000 (2005)
The reaction of (Me3SiNSN)2S with TeCl4 in CH2Cl2 affords Cl2TeS2N2 (1) and that of (Me3SiNSN)2Se with TeCl4 produces Cl2Te
Syntheses of THF solutions of SeX2 (X = Cl, Br) and a new route to selenium sulfides SenS8-n (n = 1-5): X-ray Crystal Structures of SeCl2(tht)2 and SeCl2·tmtu
Maaninen, Arto,Chivers, Tristram,Parvez, Masood,Pietikaeinen, Jarkko,Laitinen, Risto S.
, p. 4093 - 4097 (2008/10/08)
A simple and efficient synthesis of solutions of pure SeCl2 in THF or dioxane (ca. 0.4 M) at 23 °C was achieved by treatment of elemental selenium with an equimolar amount of SO2Cl2. SeCl2 was characterized by 77Se NMR and Raman spectra. SeCl2 forms 1:1 or 1:2 adducts with tetramethylthiourea (tmtu) or tetrahydrothiophene (tht), respectively. The crystal structure of SeCl2·tmtu (1) reveals a T-shaped geometry [d(Se-Cl) = 2.443(4) A] with weak intramolecular Se-Cl interactions [d(Se-Cl) = 3.276(4) A]. Crystals of 1 are triclinic, space group P1, with a = 8.473(3) A, b = 9.236(3) A, c = 7.709(4) A, α = 109.90(3)°, β= 92.26(4)°, γ = 107.89(3)°, V = 532.9(4) A 3, and Z =2. The complex SeCl2(tht)2 (2) adopts a square planar geometry with d(Se-Cl) = 2.4149-(8) A. Crystals of 2 are monoclinic, space group C2/c, with a - 15.6784(8) A, b = 9.1678(4) A, c = 9.1246(4) A, β= 110.892(2)°, V = 1225.3(1) A,3 and Z = 4. The reaction of Ph3PS with SeCl2 gives Ph3PCl2 and a complex mixture of selenium Sulfides SenS8-n (n = 1-5), which were identified by 77Se NMR. Halogen exchange between SeCl2 and Me3SiBr in THF yields thermally unstable SeBr2 (ca. 0.4 M) characterized by 77Se NMR and Raman spectra.
Synthesis, Crystal Structure, and Phase Transition of Se4(MoOCl4)2
Beck, J.
, (2008/10/08)
Dark green, very air sensitive crystals of Se4(MoOCl4)2 are formed from selenium and MoOCl4 at 190°C in a sealed, evacuated glass ampoulein quantitative yield. The structure is built of nearly square planar Se4(2+) ions and centrosymmetric dimeric MoOCl4(1-) ions which are linke d by bridging Cl atoms. At -21°C Se4(MoOCl4)2 undergoes a reversible solid state phase transition of first order. Structure determinations at -70°C and 23°C show that during the phase transition the structures of the ions remain unchanged, while the orientations of the ions with respect to each other change in such a way that in the low temperature form the Se4(2+) ions obtain a higher coordination number byCl ona O atoms of neighboring MoOCl4(1-) ions.
Synthesis and characterization of selenium-nitrogen chlorides: Force-field calculations for the Se3N2Cl+ cation
Siivari, Jari,Chivers, Tristram,Laitinen, Risto S.
, p. 4391 - 4395 (2008/10/08)
The explosive black solid 3-chloro-1,3,4,2,5-triselenadiazolium chloride, Se3N2Cl2, has been prepared in high yield by three different reactions: (a) from [(Me3Si)2N]2Se and a mixture of SeCl4 and Se2Cl2 designed to give a Se:Cl ratio of 1:3, (b) from [(Me3Si)2N]2Se and SeOCl2 in a 1:2 molar ratio, and (c) from Me3SiN3 and Se2Cl2 in a 2:3 molar ratio. The related dimer (Se3N2Cl)2 is obtained as an explosive dark brown powder by two routes: (a) from equimolar amounts of Se4N4 and Se2Cl2 and (b) from [(Me3Si)2]N]2Se and a mixture of SeCl4 and Se2Cl2 designed to give a Se:Cl ratio of 2:5. In all reactions the reagents were mixed in dichloromethane at -78 or -30°C and then allowed to warm up to room temperature. These new selenium-nitrogen chlorides have been identified by complete elemental analyses and by infrared spectroscopy. The fundamental vibrations for the Se3N2Cl+ cation were calculated using a general valence force-field approach and were used to assign the infrared spectrum of the cation. The reaction of Se3N2Cl2 with SO2Cl2 in dichloromethane at -78°C produces an unstable selenium-nitrogen chloride, characterized by 14N and 77Se NMR spectroscopy, which decomposes to give a mixture of selenium chlorides and N2.
Selenium sulfur dihalides, ChnX2 (n = 1, 2, 3; Ch = Se, S; X = Br, Cl). Raman and 77Se NMR spectroscopic characterization
Milne, John B.
, p. 693 - 699 (2007/10/02)
Solutions of Se2Cl2 in S2Cl2, Se2Br2 in S2Cl2, Se in S2Cl2, and S in Se2Cl2 have been studied by Raman and 77Se NMR spectroscopy.Selenium sulfur dihalides, SeSCl2, SeSBr2, and SeSBrCl, formed in these solutions, have been shown by Raman and 77Se NMR spectroscopy to have chain structures.Solutions of Se2Cl2 in S2Cl2, S in Se2Cl2, and Se in S2Cl2 have been shown to contain, in addition to Se2Cl2, S2Cl2, SeSCl2, Se3Cl2, and S8, trichalcogen dichlorides Se2SCl2 and SeS2Cl2.Selenium-77 signals corresponding to all seven chain isomers of the expected Se-containing dichalcogen dihalides, Se2Br2, Se2Cl2, Se2BrCl, SeSCl2, SeSBr2, BrSeSCl, and ClSeSBr, have been observed in the spectrum of a 1:1 molar mixture of S2Cl2 and Se2Br2.The disulfur dichloride and dibromide, as well as the bromide chloride, are also present.Selenium-bromine and sulfur-chlorine linkages are observed to be preferred over selenium-chlorine and sulfur-bromine bonding in these mixtures.The 77Se chemical shifts correlate well with the electronegativity of the directly bonded neighbour but inversely with that of the next-nearest neighbour.Key words: selenium halides, sulfur halides, low valent chalcogen halides, 77Se NMR, Raman spectroscopy.
Exchange processes in diselenium and selenium-sulfur dihalides, Se2X2 and SeSX2 (X = Br, Cl). A 77Se 2D-EXSY study
Milne, John,Williams, Antony J.
, p. 4534 - 4538 (2008/10/08)
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.
Crystal Structures of Compounds A2X2 (A = S, Se; X = Cl, Br)
Kniep, Ruediger,Korte, Lutz,Mootz, Dietrich
, p. 1 - 6 (2007/10/02)
The crystal structures of compounds A2X2 (A = S, Se; X = Cl, Br) contain molecules X-A-A-X with dihedral angles between 83.9 deg and 87.4 deg.Three different types of molecular packing are realized: S2Cl2, S2Br2 (α-Se2Br2) and β-Se2Br2(Se2Cl2).Details of molecular geometries as well as crystal structures are discussed. - Keywords: Sulfur(I) Halides, Selenium(I) Halides, Crystal Structure
