@article{TackeSperlichStrohmannetal.1992,
  author    = {Tacke, Reinhold and Sperlich, J{\"o}rg and Strohmann, Carsten and Frank, Brigitta and Mattern, G{\"u}nter},
  title     = {Bis[3,4,5,6-tetrabrom-1,2-benzoldiolato(2-)]-(pyrrolidiniomethyl)silicat-Acetonitril-Solvat [(C6Br4O2)2SiCH2(H)NC4H8 · CH3CN]: Synthese sowie Kristall- und Molek{\"u}lstruktur eines zwitterionischen [lambda]5-Spirosilicats},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-86884},
  year      = {1992},
  abstract  = {Single crystal X-ray studies on bis[3,4,5,6-tetrabromo-1 ,2-benzenediolato(2- )](pyrrolidiniomethyl)silicate acetonitrile solvate [(C6Br40 2hSiCH2(H)NC4H8 · CH3CN; monoclinic, P2t/c, a = 808.5(4), b = 1533.0(8), c = 2212.6(1) pm, ß = 97.67(2)0 , Z = 4] revealed a zwitterionic structure with a pentacoordinate, formally negatively charged silicon atom and a positively charged ammonium moiety. The silicon atom is surrounded by four oxygen atoms and one carbon atom in a trigonalbipyramidal fashion, with the carbon atom in an equatorial position. The structure is displaced by 7.0\% from the trigonal bipyramid towards the square pyramid. The zwitterion and the CH3CN molecule form intermolecular N-H · · · N hydrogen bonds.},
  subject      = {Kristallstruktur},
  language  = {de}
}
@article{TackeWiesenbergerLopezMrasetal.1992,
  author    = {Tacke, Reinhold and Wiesenberger, Frank and Lopez-Mras, Angel and Sperlich, J{\"o}rg and Mattern, G{\"u}nter},
  title     = {Neuartige zwitterionische λ5-Spirosilicate: Synthese und Kristallstruktur von Bis[1,2-benzoldiolato(2-)][2-(dimethylammonio)phenyl]silicat sowie Synthese von Bis[2,3-naphthalindiolato(2-)][2-(dimethylammonio)phenyl]silicat-Hemiacetonitril-Solvat},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-86916},
  year      = {1992},
  abstract  = {No abstract available.},
  subject      = {Silicate},
  language  = {de}
}
@article{SperlichBechtMuehleisenetal.1993,
  author    = {Sperlich, J{\"o}rg and Becht, Joachim and M{\"u}hleisen, Mathias and Wagner, Stephan A. and Mattern, G{\"u}nter and Tacke, Reinhold},
  title     = {Zwitterionische Bis[vic-arendiolato(2-)][(morpholinio)alkyl]silicate: Synthese sowie strukturelle Charakterisierung in L{\"o}sung und im Kristall},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-73153},
  year      = {1993},
  abstract  = {No abstract available.},
  subject      = {Silicate},
  language  = {de}
}