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1989 (1)
1Author    HeinzDieter Lutz, Thomas Kellersohn, Konrad BeckenkampRequires cookie*
 Title    Zur Kenntnis der Hydroxidhalogenide des Bariums  
 Abstract    Kristallstruktur und Schwingungsspektren von Ba[0(H,D)]X • 2 (H ,D)20 (X = CI, Br) Barium Hydroxide Halides. Crystal Structure and Vibrational Spectra of Ba[0(H ,D)]X-2(H ,D)20 (X = Cl, Br) a (0 H)2-B aX 2 -H 20 (X = CI. Br) The quaternary systems B a(O H)2—BaCl2—H 20 and B a(O H)2—BaBr2—H 20 were studied with the help of X-ray and neutron diffraction as well as IR , Raman, D T A , and TG methods. The following compounds have been established or confirmed: B a(O H)Cl hH 20 (n = 0, 1/2, 2) and B a (0 H)B r-«H 20 (n = 0, 1/2, 2). The crystal structures (of hitherto unknown structure type) of B a (0 H)C l-2 H :0 and B a (0 D)C l-2 D 20 were determined by single crystal X-ray methods and neutron powder diffraction (space group P4Inmm, Z = 2, 621 unique reflections, R — 8 . 8 and 1.9%, respectively). Whereas the hydroxide ion in this layer structured compound is non-hydrogen bonded, i.e. no H-bond donor group, nor it is bound to the Ba:+ ions, the water molecules are involved in strong H-bonds to adjacent O H " ions. The coordination of the barium ions is monocapped tetragonal antiprismatic (4 H 20 and 5 halide ions). The IR and Raman spectra of B a (0 H)X -2 H :0 (X = Cl. Br) are assigned and discussed in terms of hydrogen bonding, isotopic shifts, and intermolecular coupling of the bands observed. The stretching modes of the O H " ions (3672 and 3667 cm-1, 95 K) are shifted to higher wavenumbers by about 100 cm"' as compared with those of free O H -ions. 
  Reference    Z. Naturforsch. 44b, 928 (1989); eingegangen am 6. Februar/7. April 1989 
  Published    1989 
  Keywords    Crystal Structure, Barium Hydroxide Halides, Infrared Spectra, Raman Spectra, System: B 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0928.pdf 
 Identifier    ZNB-1989-44b-0928 
 Volume    44