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  • Organic polysulfanes  (3)
  • Sulfur heterocycles  (2)
  • Wolinella succinogenes  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Growth of Wolinella succinogenes with polysulphide as terminal acceptor of phosphorylative electron transport (1991)
    Springer
    Archives of microbiology 155 (1991), S. 177-182 
    Details
    ISSN: 1432-072X
    Keywords: Sulphur respiration ; Polysulphide ; Electron transport ; Wolinella succinogenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Polysulphide was formed according to reaction (1), when tetrathionate was (1) $${\text{S}}_4 {\text{O}}_6^{2 - } + {\text{HS}}^ - \to 2{\text{S}}_2 {\text{O}}_3^{2 - } + {\text{S(O)}} + {\text{H}}^ + $$ added to an anaerobic buffer (pH 8.5) containing excess sulphide. S(O) denotes the zero oxidation state sulphur in the polysulphide mixture S infn sup2- . The addition of formate to the polysulphide solution in the presence of Wolinella succinogenes caused the reduction of polysulphide according to reaction (2). The bacteria grew in a medium containing formate and sulphide, (2) $${\text{HCO}}_2^ - + {\text{S(O)}} + {\text{H}}2{\text{O}} \to {\text{HCO}}_3^ - + {\text{HS}}^ - + {\text{H}}^ + $$ when tetrathionate was continuously added. The cell density increased proportional to reaction (3) which represents the sum of reactions (1) and (3) $${\text{HCO}}_2^ - + {\text{S}}_{\text{4}} {\text{O}}_6^{2 - } + {\text{H}}2{\text{O}} \to {\text{HCO}}_3^ - + 2{\text{S}}_{\text{2}} {\text{O}}_3^{2 - } + 2{\text{H}}^ + $$ (2). The cell yield per mol formate was nearly the same as during growth on formate and elemental sulphur, while the velocity of growth was greater. The specific activities of polysulphide reduction by formate measured with bacteria grown with tetrathionate or with elemental sulphur were consistent with the growth parameters. The results suggest that W. succinogenes grow at the expense of formate oxidation by polysulphide and that polysulphide is an intermediate during growth on formate and elemental sulphur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248614
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  • 2
    Electronic Resource
    Electronic Resource
    The electrochemical proton potential generated by the sulphur respiration of Wolinella succinogenes (1989)
    Springer
    Archives of microbiology 152 (1989), S. 600-605 
    Details
    ISSN: 1432-072X
    Keywords: Sulphur respiration ; Electrochemical proton potential ; Wolinella succinogenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Wolinella succinogenes grown on formate and elemental sulphur was found to use the polysulphide derivatives 2,2′-tetrathiobispropionate (R2S4) or pentathionate (S5O 6 = ) as acceptors for formate oxidation. The specific activities of formate oxidation with these acceptors were similar to those with elemental sulphur. The main reaction products of R2S4 reduction were 2,2′-dithiobispropionate (R2S2) and sulphide. Pentathionate was converted to thiosulphate and some elemental sulphur. The electrochemical proton potential $$(\Delta \tilde \mu _H )$$ across the cytoplasmic membrane of the bacterium was measured in the steady state of electron transport from formate to R2S4. The electrical proportion (Δψ) of the $$(\Delta \tilde \mu _H )$$ determined through the distribution of labeled tetraphenylphosphonium cation was obtained as 0.17 Volt. The Δψ was zero, when a protonophore was present. The pH-difference across the membrane was negligible. Thus the $$(\Delta \tilde \mu _H )$$ generated by sulphur respiration is close to that measured earlier with fumarate as the terminal acceptor of electron transport.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00425494
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  • 3
    Electronic Resource
    Electronic Resource
    Sulfur Compounds, 199Part 198: R. Steudel, Y Drozdova, K. Miaskiewicz, R. H. Hertwig, W. Koch, J Am. Chem. Soc. 1997, 119, 1990.. Novel Titanocene Thiolato Complexes and Their Application in Preparing New Sulfur-Containing Heterocycles (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 757-764 
    Details
    ISSN: 0009-2940
    Keywords: Titanocene complexes ; S ligands ; Organic polysulfanes ; Ligand transfer reactions ; Sulfur heterocycles ; Chalcogens ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Treatment of Cp2Ti(CO)2 (3) with the di- and polysulfanes 1,2,4-(CH2)2S3, C4S6 (9), C,7H10S3 (11), 1,2,4,6-(CH2)3S4 (16), C6H10S6(19), and S6 affords the titanocene chelate complexes Cp2TiS3(CH2)2 (8), (Cp2Ti)2C4S6 (10), Cp2TiS3C7H10 (13), Cp2TiS2C7H10 (14), Cp2TiS4(CH2)3 (17), Cp,2TiS6C6H6H10 (20), and Cp2TiS8 (23). 14 is also obtained from Cp2TiCl2 (1) and the geminal dithiol of norbornene. The analogous reaction with the dithiol of dicyclopentadiene yields Cp2TiS2C10H12 (15). In ligand transfer reactions, 8 reacts with SCl2 to give 1,2,3,5-tetrathiane (25), 10 provides 9 on reaction with Cl2, 13 when treated with S2Cl2 affords C7H10S5 (12), 15 reacts with S2Cl2Cl2 to give C10H12S4. 17 and SCl2 yield 1,2,3,5,7-pentathiepane (18), 20 is converted to C6H10S7 (22) on reaction with SCl2, and 23 yields S10 and 1,2,-C6H4(SCl)2, respectively. With phosgene, thiophosgene, and thionyl chloride, compound 15 yields the corresponding dithiocarbonate 26, the trithiocarbonate 27 and the trisulfane 2-oxide 28. The structure of 27 was determined by X-ray crystallography.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300614
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of Bis(trichloromethyl)tetra- and -heptasulfane from Titanocene Polysulfide Complexes and Structure of (CCl3)2S7 (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 725-728 
    Details
    ISSN: 0009-2940
    Keywords: Organic polysulfanes ; Titanocene compounds ; Sulfur ligand transfer ; Chain length equilibration ; Sulfur helix ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: CCl3SCl reacts with (C5H5)2TiS5 to give the heptasulfane (CCl3)2S7 which forms colorless crystals of m.p. 38°C. An X-ray structural analysis revealed that the C-S7-C chain is helical but the CCl3 groups are slightly tilted. In the triclinic crystals the molecules are arranged parallel to each other. Decomposition of (CCl3)2S7 provides other members of the homologous series with 4-12 sulfur atoms as shown by HPLC analysis. The reaction of CCl3SCl with (C5H4-CH3)4Ti2S4 yields colorless crystals of (CCl3)2S4, demonstrating the usefulness also of dinuclear titanocene polysulfide complexes for the synthesis of organic polysulfanes. Infrared, Raman, and 13C-NMR spectra of (CCl3)2S7 and (CCl3)S7 are reported.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280711
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation of Organic Polysulfanes R2Sn (n = 5, 7, 8, 9) from Sulfenyl Chlorides, RSCl, and Transition Metal Polysulfido Complexes (2000)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 2000 (2000), S. 921-928 
    Details
    ISSN: 1434-1948
    Keywords: Sulfur ; Titanium ; Zinc ; Polysulfido complexes ; Sulfur heterocycles ; Polysulfides ; Polysulfanes ; Sulfenyl chlorides ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation of seven novel organic polysulfanes is reported. Bis(n-octyl)heptasulfane R2S7 1 is formed upon reaction of RSCl with [Cp2TiS5], while the corresponding nonasulfane R2S9 2 is obtained by reaction of RSSCl with [Cp2TiS5]. The bis(n-octyl)pentasulfane R2S5 3 is obtained from RSCl and [(Cp′2TiCl)2S3] by transfer of the S3 ligand at 20 °C. The new alkyl polysulfanes 1-3 have been obtained in quantitative yields. They are liquids at 20 °C, having freezing points below -50 °C, but do not form mesogenic phases. Reactions of [Cp2TiS5] with 2-naphthyl- and 4-chlorophenyl sulfenyl chloride furnish the corresponding heptasulfanes 4 and 5, respectively, which are solids at 20 °C. 1,2-Benzodisulfenyl chloride C6H4(SCl)2 reacts with [(Cp′2TiCl)2S3] to give the known 1,2,3,4,5-benzopentathiepin C6H4S5 6, with [Cp2TiS5] to give the novel 1,2,3,4,5,6,7-benzoheptathionin C6H4S7 7, and with [(TMEDA)ZnS6] to give the novel 1,2,3,4,5,6,7,8-benzooctathiecin C6H4S8 8. The cyclic polysulfanes 6-8 are solids at 20 °C and have been recovered in yields of 60-83%. The orthorhombic structure of 1,2-C6H4S7 has been investigated by single-crystal X-ray diffraction analysis. The molecules are found to be located at sites of Cs symmetry and the motif of the C2S7 heterocycle is +-+-+-+-, with the torsion angle of zero at the carbon-carbon bond. The three internuclear SS distances measure 205.0(1), 203.7(1), and 205.7(1) pm.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Preparation of spiro-cyclic organic polysulfanes of type C6H10Sn and x-ray structural analysis of C6H10S11, a derivative of cyclo-dodecasulfur (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1594-1600 
    Details
    ISSN: 0044-2313
    Keywords: Organic polysulfanes ; NMR spectra ; X-ray structural analysis ; high-pressure liquid chromatography ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung spirocyclischer organischer Polysulfane des Typs C6H10Sn und Röntgenstrukturanalyse von C6H10S11Durch Reaktion von (C5H5)2Ti(μ-S2)2C6H10 3 mit S2Cl2 wurde 7,8,9,10,11,12-Hexathiaspiro[5,6]dodecan 4 hergestellt (Ausbeute 51%), das durch UV-, IR-, Raman-, Massen- und NMR-Spektren (1H, 13C) charakterisiert wurde. Die NMR-Spektren zeigen, daß der siebengliedrige CS6-Ring in Lösung Pseudorotation erleidet. Mit S7Cl2 reagiert der Komplex 3 zu 7,8,9,10,11,12,13,14,15,16,17-Undecathiaspiro-[5.11]heptadecan 5 (Ausbeute 23%). Die gelben, monoklinen Kristalle von 5 bestehen aus spirocyclischen C6H10S11-Molekülen, deren C6-Ring Sesselkonformation aufweist, während der CS11-Ring eine dem cyclo-Dodecaschwefel S12 entsprechende Konformation besitzt. Alle Glieder der homologen Reihe C6H10Sm (m = 5-14) wurden mittels HPLC charakterisiert.
    Notes: By reaction of (C5H5)2Ti(μ-S2)2C6H10 3 with S2Cl2 7,8,9,10,11,12-hexathiaspiro-[5.6]dodecane 4 is prepared (yield 51%) and characterized by UV, IR, Raman, mass, and NMR spectra (1H, 13C). The seven-membered CS6 ring undergoes pseudorotation in solution. With S7Cl2 the complex 3 yields 7,8,9,10,11,12,13,14,15,16,17-undecathiaspiro[5.11]heptadecane 5 (yield 23%). The yellow, monoclinic crystals of 5 consist of spirocyclic C6H10S11 molecules with the C6 ring in a chair-conformation while the CS11 ring is of the same conformation as cyclododecasulfur S12. UV, IR, Raman, mass and NMR-spectra of 5 are reported. A mixture of dichlorosulfanes SnCl2 (n = 1 -8) reacts with 3 to give the homologous series C6H10Sm which was characterized by reversed-phase HPLC for m = 5 - 14.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220924
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