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  • Polysulfanes  (2)
  • Strukturaufklärung  (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
    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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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Große Schwefel-Stickstoff-Heterocyclen: Synthese der Schwefelimide SnNH (n = 8, 9, 11) und Strukturen von S8NH und S9NHSchwefelverbindungen, 196. Mitteilung. Diese Arbeit wurde von der Deutschen Forschungsgemeinschaft, dem Deutschen Akademischen Austauschdienst und dem Fonds der Chemischen Industrie unterstützt. 195. Mitteilung: Lit. [1]. (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 108 (1996), S. 2641-2643 
    Details
    ISSN: 0044-8249
    Keywords: Schwefelverbindungen ; Stickstoffverbindungen ; Strukturaufklärung ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19961082111
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  • 5
    Electronic Resource
    Electronic Resource
    Schwefelsäure aus Schwefeltrioxid und Wasser - eine überraschend komplexe ReaktionSchwefelverbindungen, 189. Mitteilung. Für die Anfertigung der Abb. 1-4 danke ich Frau Dr. Yana Drozdova. 188. Mitteilung: M. Pridöhl, R. Steudel, J. Buschmann, P. Luger, Z. Anorg. Allg. Chem., im Druck. (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 107 (1995), S. 1433-1435 
    Details
    ISSN: 0044-8249
    Keywords: Atmosphärenchemie ; Schwefelsäure ; Schwefelverbindungen ; Strukturaufklärung ; Wasserstoffbrücken ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19951071206
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  • 6
    Electronic Resource
    Electronic Resource
    Crystal and Molecular Structures as well as Spectra of Two Organic Tetrasulfanes R2S4 (R = 2-benzothiazolyl and 4-chlorophenyl) (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1021-1024 
    Details
    ISSN: 0044-2313
    Keywords: Polysulfanes ; structure ; spectra ; preparation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Kristall- und Molekülstrukturen sowie Spektren zweier organischer Tetrasulfane R2S4 (R = 2-Benzothiazolyl und 4-Chlorphenyl)Bis(2-benzothiazolyl)tetrasulfan, hergestellt aus dem Mercaptan und S2Cl2, kristallisiert in der monoklinen Raumgruppe C2/c mit den im Abstract angegebenen Zelldimensionen. Die Moleküle haben C2-Symmetrie; das S4-Gerüst ist von all-trans-Konformation mit den Parametern dss = 202,7 (terminal) und 207,3 pm (zentral), αsss = 106,4° und τssss = 78,5°. Bis(4-chlorphenyl)tetrasulfan kristallisiert in der monoklinen Raumgruppe P21/a (s. Abstract). Die Moleküle befinden sich in allgemeinen Lagen, sind aber näherungsweise von C2-Symmetrie und ebenfalls von all-trans-Konformation mit dss = 203,6 (terminal), 206,7 (zentral) und 202,3 pm (terminal), αsss = 107,4° und 108,4° sowie τssss = 75,5°. Die intermolekularen Wechselwirkungen sind vom van der Waals-Typ. Infrarot-, Raman-, Massen- und NMR-Spektren (1H, 13C) der Verbindungen werden mitgeteilt.
    Notes: Bis(2-benzothiazolyl)tetrasulfane prepared from the mercaptane and S2Cl2 crystallizes in the monoclinic space group C2/c with a = 3513 pm, b = 577.28 pm, c = 800.0 pm, β = 98.74°, ρ = 1.64 g cm-3 (at 298 K). The molecules are of C2 symmetry with the geometrical parameters of the S4 backbone: dss = 202.7 (terminal) and 207.3 pm (central), αsss = 106.4°, τssss = 78.5°. The overall conformation is all-trans.Bis(4-chlorophenyl)tetrasulfane prepared from the mercaptane and diisopropoxydisulfane crystallizes in the monoclinic space group P21/a with a = 1237.7 pm, b = 748.4 pm, c = 1623.9 pm, β = 105.58°, ρ = 1.61 g cm-3 (at 298 K). The molecules occupy general positions but are approximately of C2 symmetry with dss = 203.6 (terminal), 206.7 (central) and 202.3 pm (terminal), αsss = 107.4° and 108.4°, τssss = 75.5° (all-trans conformation). The intermolecular interactions are of van der Waals type. Infrared, Raman, mass and NMR spectra (1H, 13C) are reported.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210621
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