Go toArchive
Browse byFacets
Bookbag ( 0 )
'Crown Ether' in keywords Facet   section ZfN Section B:Volume 036  [X]
Results  2 Items
Sorted by   
Publication Year
1981 (2)
1Author    Gabriela WeberRequires cookie*
 Title    The Structure of a 2:1 Host Guest Complex between p-Nitroaniline and 18-Crown-6  
 Abstract    The crown and two nitroaniline molecules are linked by four N-H • • • O interactions leaving the cyclic ether in a strain free conformation of approximate Ü3d symmetry. Partial disorder of one O atom facilitates one more H bond but induces considerable conformational strain in the ligand. 
  Reference    Z. Naturforsch. 36b, 896—897 (1981); received May 6 1981 
  Published    1981 
  Keywords    Neutral Complexes, Crown Ethers, H Bonds, X-ray 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0896_n.pdf 
 Identifier    ZNB-1981-36b-0896_n 
 Volume    36 
2Author    R. Hilgenfeld, W. SaengerRequires cookie*
 Title    Stabilization of a Host-Guest Type Complex by Bifurcated Hydrogen Bonds : 18-crown-6 * (2,4-Dinitrophenylhydrazine)2 a  
 Abstract    The X-ray structure of the 1:2 host-guest complex between 1,4,7,10,13,16-hexaoxa-cyclooctadecane (18-crown-6) and 2,4-dinitrophenylhydrazine is reported. Crystallo-graphy data are: space group P2i/c, a = 8.557(2), b = 16.745(6), c = 12.387(4) Ä, ß = 117.08(13)°, Z = 2, Dm = 1.37 g • cm" 3 , Dc = 1.387 g • cm-3 , m.p. 414 K (decomp.). The present B is 0.11 for 1733 diffractometer data. In the complex, the two 2,4-dinitrophenylhydrazine molecules are located "above" and "below" the plane of the hexaether and related by an inversion centre. They interact with the macrocyclic host via N-H---0 hydrogen bonds, two of which are bifurcated. All the ether oxygens of the crown serve as hydrogen bond acceptors. 
  Reference    Z. Naturforsch. 36b, 242—247 (1981); received October 28 1980 
  Published    1981 
  Keywords    Crown Ether, Dinitrophenylhydrazine Complex, Bifurcated Hydrogen Bonds, X-ray 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0242.pdf 
 Identifier    ZNB-1981-36b-0242 
 Volume    36