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'Pyridinium' in keywords
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2001 (1)
1992 (1)
1Author    PeterG. Jones, M. Artina, Näveke Und Arm, BlaschetteRequires cookie*
 Title    Polysulfonylamine, XXXI [1] Kristallstruktur von (1-Trichlormethylthio- 4-dimethylaminopyridinium)dimesylamid bei -9 5 °C Polysulfonylamines, XXXI [1] Crystal Structure o f 1-Trichloromethylthio- 4-dimethylaminopyridinium Dimesylamide at -9 5 °C  
 Abstract    The crystal structure o f the title com pound was determined at -9 5 °C. It crystallizes in space group P 1 with a = 577.5(3), b = 820.2(3), c = 1916.6(8) pm, a = 83.34(2), ß = 82.83(2), y = 83.61(2)° and Z = 2. The final R value was 0.034 for 3019 unique observed reflections. The presence o f aggregates o f four ions (two cations and two an­ ions) in the solid state is observed, with short cat-ion-anion contacts Sn — 0 (290 pm) and Cl --O (298 pm). The bond lengths o f the 4-dimethyl-aminopyridinium moiety o f the cation suggest a semiquinoid resonance form with a double bond to the nitrogen o f the dim ethylam ino group and two localized double bonds in the ring. The ring, the dimethylamino group (except H atom s) and the Sn atom are coplanar. The S " -N bond length is 170.3 pm, the N -S " -C angle 99.6°. The S ° -C bond is approximately perpendicular to the ring plane. 
  Reference    Z. Naturforsch. 47b, 441—4 (1992); eingegangen am 17. September 1991 
  Published    1992 
  Keywords    Pyridinium, Dimesylamide, Polysulfonylamine, X-Ray 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0441_n.pdf 
 Identifier    ZNB-1992-47b-0441_n 
 Volume    47 
2Author    Matthias Frey, PeterG. JonesRequires cookie*
 Title    Secondary Bonding Interactions in Some Halopyridinium and Dihalopyridinium Halides  
 Abstract    The packing motifs of 2-and 3-chloropyridinium chloride can be interpreted in terms of classical hydrogen bonds N+-H -C 1~ and non-classical C-H--C1" interactions, with halo-gen-halogen contacts playing a subordinate role. In the corresponding bromine derivatives, Br--Br interactions are much more important. Of the dihalo derivatives, 3,5-dichloropyridinium chloride crystallises with classical linear hydrogen bonds of the form N+-H -C1_ , but its chlorine-chlorine interactions are at best weak; the corresponding bromine derivative displays aggregates of bromine atoms and three-centre hydrogen bonds N+-H (-B r")2 . 
  Reference    Z. Naturforsch. 56b, 889—896 (2001); received May 15 2001 
  Published    2001 
  Keywords    Pyridinium, Halides, Hydrogen Bonds 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0889.pdf 
 Identifier    ZNB-2001-56b-0889 
 Volume    56