- Interaction of 1,3λ4δ2,2,4-benzodithiadiazines with neutral and charged S-electrophiles: SCl2, C6F5SCl, and NS2+
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[Figure not available: see fulltext.] Reactions of 1,3λ4δ2,2,4-benzothiadiazines with SCl2, C6F5SCl, and [NS2][SbF6] leading to 1,2,3-benzodithiazolium salts (Herz salts) were in
- Makarov, Alexander Yu.,Bagryanskaya, Irina Yu.,Zhivonitko, Vladimir V.
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p. 968 - 972
(2020/08/26)
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- 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
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The reaction of (Me3SiNSN)2S with TeCl4 in CH2Cl2 affords Cl2TeS2N2 (1) and that of (Me3SiNSN)2Se with TeCl4 produces Cl2Te
- 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.
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p. 4992 - 5000
(2008/10/09)
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- The Pyrolysis of Heptathiazocine
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Heptathiazocine was pyrolyzed into ammonia, tetrasulfur tetranitride, and tetrasulfur dinitride above 383 K in an argon atmosphere; then, the latter two intermediates finally degraded into sulfur and nitrogen.According to the stoichiometric correlation am
- Kudo, Yoshiyuki,Hamada, Shuichi
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p. 2391 - 2394
(2007/10/02)
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- Chemical and Photochemical Effects in Sulphur Ammonia Solutions
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Solid sulphur dissolves in liquid ammonia forming a series of light absorbing species the equilibrium concentrations of which are established very slowly.On adding an excess of Ag+-ions, 58+/-2percent of the sulphur is precipitated as Ag2S although in equilibrium practically no H2S or S=-ions are present (1E-12 to 1E-15 M); the solutions turn yellowish due to S4N4 (light absorption at 255 and 360 nm) formed after Ag2S precipitation.On fractional precipitation two strong absorption bands around 575 and 465 nm arise, vanishing again at complete Ag2S precipitation.The two components causing this intermediate absorption are photosensitive.On irradiating the 575 nm band it disappears, that at 465 nm increases.On irradiating the 465 nm band, inverse effects are observed.We do not want to speculate yet about the nature of the many compounds present in the solutions. - Keywords: Non-aqueous solvents / Photochemistry / Electrochemistry / Sulphur ammonia solutions
- Prestel, H.,Seelert, S.,Schindewolf, U.
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- Vaporization of (SN)x: He I Photoelectron Spectrum and ab Initio Calculations for the S3N3 Radical
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The S3N3 radical, never previously characterized, is shown to be the major semistable component of the vaporization products of the (SN)x polymer, as identified by He I photoelectron spectroscopy and in situ quadrupole mass spectrometry.This species can be recondensed to yield the (SN)x polymer and other colored materials.Revaporization produces S3N3 in addition to S4N4, S4N2, and S2N2.Ab initio calculations with better than a double-ζ basis set and including configuration interaction provide evidence for a 2A2 radical with a planar ring geometry close to D3h.The ground-state cation also has a planar ring geometry with 3A2' favored over 1A1'.
- Lau, W. M.,Westwood, N. P. C.,Palmer, M. H.
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p. 3229 - 3237
(2007/10/02)
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- Synthesis and crystal structure of [(Ph3P)2(CO)2(S2N 2)RuCl]+AlCl4-. Preparation of novel S2N2 complexes
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The complex [(Ph3P)2(CO)2(S2N 2)RuCl]+AlCl4- has been prepared by the reaction of (Ph3P)2(CO)2RuCl2 with S2N2·2AlCl3, and its structure is determined by single-crystal X-ray analysis. It crystallizes in the monoclinic space group Cc with a = 10.365 (1) A?, b = 23.185 (5) A?, c = 18.361 (3) A?, β = 106.06 (1)°, and Z = 4. The structure was refined to R = 0.041, Rw = 0.038 for 3292 reflections with I ≥ 2.0(σ(I)). In the cation the S2N2 is coordinated as a monodentate ligand. A considerable degree of bond fixation is observed within the S2N2 ring possibly as a result of a relatively strong intramolecular S?Cl interaction of length 2.918 (4) A?. In addition complexes of S2N2 with SnCl4, TiCl4, AlBr3, and BeCl2 are prepared by various synthetic routes: the reaction of S(NSO)2 with TiCl4 leads to S2N2·TiCl4; cleavage of the eight-membered S4N4 ring occurs on heating S4N4·TiCl4 and S4N4·2BeCl2; S2N2 forms 1:1 adducts when it is added to excess SnCl4 or TiCl4. The vibrational spectra of the compounds are discussed.
- Roesky,Anhaus,Sheldrick
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- Preparation and X-Ray Crystal Structure of (S3N2)2NAsF6, containing the Bis(thiodithiazyl)aminylium(1+) Cation
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Crystalline (S3N2)2NAsF6 was prepared in ca. 60percent yield from a 1:1 mixture of S4N4 and S2NAsF6 in liquid SO2 at 0 deg C, and its structure determined by X-ray crystallography.The compound crystallises in the monoclinic space group C2/c with unit-cell dimensions a = 17.343(6), b = 17.103(6),c = 16.737(9) Angstroem, β = 98.29(3), and Z = 16.The stucture was solved by direct methods and refined by least-squares techniques to a final R of 0.11 for 2 308 observed reflections. (S3N2)2NAsF6 is essentially ionic with sulfur-fluorine cation-anion contacts.The (S3N2)2N+ cation is the first example of a monobridged bicyclic sulphur-nitrogen cation, and consists of two thiodithiazyl (S3N2) groups connected together by a bridging nitrogen atom attached to a sulphur atom of each S3N2 ring.The S3N2 rings are cis with respect to the bridging nitrogen atom, and are essentially eclipsed with respect to the SNS bridge. (S3N2)2NAsF6 reacts with CsN3 in liquid SO2 solution yielding impure poly(sulphur nitride) and CsAsF6.Solutions of (S3N2)2NAsF6 in liquid SO2 slowly disproportionate to S4N3AsF6 and S4N4.The i.r. spectrum of (S3N2)2NAsF6 is also reported.
- MacLean, Gregory K.,Passmore, Jack,White, Peter S.
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p. 211 - 218
(2007/10/02)
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- Transition Metal Sulfur-Nitrogen-Complexes, II. Ni(S2N2H)2 as S2N2-Synthon: A New Way to Cyclic Sulfur Nitrogen Compounds
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Facile syntheses of S3N2O, S2N2CO and S4N2 from Ni(S2N2H)2 are described. - Keywords: Cyclic Sulfur Nitrogen Compounds, Tetrasulfur Dinitride
- Heitmann, Axel,Edelmann, Frank
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p. 521 - 522
(2007/10/02)
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- Reactions of Trithiazyl Trichloride with Ruthenium, Rhodium and Iridium Complexes
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The syntheses of the thionitrosyls and other complexes by the reactions of Ru(CO)3(PPh3)2, RhH(PPh3)4, Rh(NO)Br2(PPh3)2 and IrHCl2(PPh3)3 with trithiazyl trichloride are described.The new complexes obtained have been characterized by elemental analyses, IR, conductivity and magnetic data.
- Jain, K. C.,Agarwala, U. C.
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p. 336 - 337
(2007/10/02)
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- S4N4 and its Derivatives: Preparation, Structure and Thermolysis of CuBr*S4N4
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The crystalline black polymeric CuI complex CuBr*S4N4 can be prepared in high yield from Cu(NO3)2*3H2O, NH4Br and S4N4 in methanol.An X-ray structure analysis shows that it is isostructural with CuCl*S4N4.The crystals contain infinite chains and the Cu atoms of adjacent chains are bridged by S4N4 groups.The Cu atoms have an almost tetrahedral coordination.The 1,3-N,N'-bonded S4N4 group has the same conformation and, within narrow limits, the same dimensions as free S4N4.Thermolysis of CuBr*S4N4 at 180 deg C yields among other products CuBr, S4N4 and S2N2. - Key wor ds: Copper(I) Complex, Tetrasulfurtetranitrid Adduct, Disulfurdinitrid, Molecular Structure, Inorganic Polymer
- Thewalt, Ulf,Mueller, Bernhard
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p. 828 - 831
(2007/10/02)
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