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1998 (1)
1Author    Frank Wendland, Christian Näther, Michael Schur, Wolfgang BenschRequires cookie*
 Title    Solvothermal Synthesis and Crystal Structure Determination of Tris- (ethyleneamine-ammonium) Tetraselenoantimonat: Non-Centrosymmetry Mediated by an Extended Unusual N-H***N Hydrogen Bonded Network?  
 Abstract    The title compound has been synthesized under solvothermal conditions by the reaction of elemental chromium, antimony and selenium in a solution of 40% 1,2-ethanediamine (en) in methanol. The crystal structure consists of tetrahedral SbSe,*3 --anions which are connected by monoprotonated 1,2-ethanediamine (enH+) cations via N-H--Se hydrogen bonding. The enH+ cations are joined via strong N-H -N hydrogen bonds between the ammonium hydrogen and the amino nitrogen atom forming four distinct chains, each built up of three crystallographically independent enH+ cations. Two of these chains are running parallel to [100], the other two are parallel to [010]. Based on this arrangement different centrosymmetric or non-centrosymmetric hydrogen bonding patterns are possible, but only in one chain the sequence of NH2 and NH3+ groups was determined by X-ray diffraction. 
  Reference    Z. Naturforsch. 53b, 1144—1148 (1998); received June 15 1998 
  Published    1998 
  Keywords    Selenoantimonates, Solvothermal Synthesis, Crystal Structure, Hydrogen Bonding 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1144.pdf 
 Identifier    ZNB-1998-53b-1144 
 Volume    53