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'Elemental Sulfur' in keywords Facet   Publication Year 1983  [X]
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1983[X]
1Author    Ralf Steudel, Jürgen Steidel, Richard ReinhardtRequires cookie*
 Title    X-Ray Structural Analyses of Cyclodecasulfur (S10) and of a Cyclohexasulfur-Cyclodecasulfur Molecular Addition Compound (S6 * S10) [1]  
 Abstract    Low temperature X-ray structural analyses of monoclinic single crystals of Sio and Sö • Sio (prepared from the components) show that the cyclic Sio molecule exhibits the same D2 conformation in both compounds with bond distances between 203.3 and 208.0pm, bond angles (a) between 103 and 111°, and torsional angles (r) between 73 and 124°. The Sß molecule (site symmetry Ci) in Sö • Sio is very similar to the one in pure Sö (dss = 206.2 pm, a= 103°, r = 74°). All intermolecular interactions are of van-der-Waals type. The Raman spectrum of S6 • Sio can be explained by a superposition of the Se and Sio spectra. 
  Reference    Z. Naturforsch. 38b, 1548—1556 (1983); received August 11 1983 
  Published    1983 
  Keywords    Elemental Sulfur, Sulfur Rings, Molecular Structure, Crystal Structure, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1548.pdf 
 Identifier    ZNB-1983-38b-1548 
 Volume    38 
2Author    Ralf SteudelRequires cookie*
 Title    Barrier to Rotation about Sulfur-Sulfur Bonds in Homocyclic Sulfur Molecules [1]  
 Abstract    It is shown that the distances (d) of the 19 longest bonds in 9 homocyclic sulfur rings of type Sn (n = 6-20) depend on the torsional angles (r) which vary between 0° and 140°. The function d = f (r) is smallest for r = 90-100° and largest for r = 0°; the corresponding bond distance variation amounts to 13 pm or 6%. The height of the torsional cis-barrier is estimated from the enthalpy of formation of gaseous S7 as equal to or smaller than 24 kJ/mol. 
  Reference    Z. Naturforsch. 38b, 543—545 (1983); received January 18 1983 
  Published    1983 
  Keywords    Elemental Sulfur, Sulfur Rings, Sulfur-Sulfur Bonds, Torsional Barrier, Bond Distances 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0543.pdf 
 Identifier    ZNB-1983-38b-0543 
 Volume    38