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'Zwitterions' in keywords Facet   section ZfN Section B  [X]
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1998 (1)
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1Author    FrankW. Heinemann, Helm Ut, Hartung, NadjaM. AierRequires cookie*
 Title    Kristall-und Molekülstruktur von 2-[3-(N,N-Diethylammonium)propylimino]-2-phenyl-dithioacetat Crystal and Molecular Structure of 2-[3-(N,N-Diethylammonium)propylimino]-2-phenyl-dithioacetate  
 Abstract    The title compound, formed by the reaction o f acetophenone with 3-diethylamino-1-propylamine and sulfur, crystallizes in the orthorhombic space group P 2 12 12 1 (Z = 4) with lattice constants a = 818.1(2) pm, b -1225.1(2) pm and c = 1622.4(4) pm. The characterization of the molecule as a zwitterion is established by the observed bond parameters. Both spec­ troscopic investigations and the results of the X-ray structure determination show that a hydrogen atom is bonded to the amino nitrogen rather than to the imino nitrogen. 
  Reference    (Z. Naturforsch. 50b, 81—8 [1995]; eingegangen am 9. August 1994) 
  Published    1995 
  Keywords    Dithioacetates, A cetophenone, Crystal Structure, Zwitterion, Betaine 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0081.pdf 
 Identifier    ZNB-1995-50b-0081 
 Volume    50 
2Author    Reinhold Tacke, Joachim Heermann, Melanie PiilmRequires cookie*
 Title    Pentafluoro[(4-methyl-1,4-bisazoniacy clohex-1 -yl)methy 1] germanate Hydrate: Synthesis and Crystal Structure of a Zwitterionic A6Ge-Germanate with a GeF5C Framework  
 Abstract    The zwitterionic (molecular) A6Ge-germanate pentafluoro[( 
  Reference    Z. Naturforsch. 53b, 535—539 (1998); received December 17 1997 
  Published    1998 
  Keywords    Hexacoordinate Germanium, Zwitterion, Preparation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0535.pdf 
 Identifier    ZNB-1998-53b-0535 
 Volume    53 
3Author    Edgar Niecke, Rainer KröherRequires cookie*
 Title    Synthese und Additionsreaktionen von 1.3.2A 2 .4-Diazaphosphoniaahiminatacyclobutanen [1] Synthesis and Addition Reactions of l,3,2/. 2 ,4-Diazaphosphoniaaluminatacyclobutanes [1]  
 Abstract    -silylated aminoiminophosphines react with aluminium trihalides to give acyclic zwitterions having two-coordinated phosphorus. At about room temperature these adducts decompose by elimination of silylhalide and formation of l,3,2A 2 ,4-diazaphosphonia-aluminatacyclobutanes. Reaction of halogens and alkyl halides with the cyclic zwitterions results in formation of the corresponding 1,1-addition products. With alkyl-azides one obtains bicyclic phosphorus nitrogen heterocycles whilst in the reaction with trimethyl-silylazide the isomeric monocyclic azide derivative is formed. The IR and NMR spectra of the cyclic zwitterions are briefly discussed. 
  Reference    Z. Naturforsch. 34b, 837—842 (1979); eingegangen am 2. Februar 1979 
  Published    1979 
  Keywords    Zwitterions, Twofold Coordinated Phosphorus, Addition Reactions, IR, NMR N 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0837.pdf 
 Identifier    ZNB-1979-34b-0837 
 Volume    34