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41Author    Matthias Westerhausena, Mathias Kroftaa, Nils Wiberga, Jörg Knizeka, Heinrich Nötha, Arno PfitznerbRequires cookie*
 Title    Tetrazinn(II)-und Bariumtrizinn(II)-tetrakis[/i3 -tri-ter/-butyIsilylphosphan- diid]-Verbindungen mit einem Tetrametallatetraphosphacuban-Gerüst Tetratin(II) and Barium Tritin(II) Tetrakis[//3-tri-rm-butylsilylphosphandiide] Compounds with a Tetrametallatetraphosphacubane Core  
 Abstract    The metalation o f tri-terr-butylsilylphosphane with bis[bis(trimethylsilyl)amino]stannylen yields nearly quantitatively the tetrameric tin(II) tri-terf-butylsilylphosphandiide with a central Sn4 P4 cubane moiety. Barium bis[tri-/£Tf -butylsilylphosphanide] is accessible via the reaction o f tri-?£T/-butylsilylphosphane with barium bis[bis(trimethylsilyl)amide] in the molar ratio 2 : 1 . This phosphanide reacts with bis[bis(trimethylsilyl)amino]stannylen to give barium tritin(II) tetrakis[/i3-tri-ter?-butylsilylphosphandiide]. Crystallographic data of 1: P 21212), T = 193 K, a = 1532.6(3), b = 2120.2(4), c = 2194.0(5) pm, V = 7.129(3) nm3, Z = 4, R, = 0.0360 (9132 observed data [I > 2a(f)]), wR2 = 0.1064 (all data); crystallographic data of 3: P 2,/c, T= 193 K, a = 1927.35(1), b = 1799.27(2), c = 2201.35(2) pm, ß = 93.010(1)°, V= 7.6234(1) nm3, Z = 4, R, = 0.0321 (11993 observed data [I > 2cr(/)]), wR2 = 0.0772 (all data). 
  Reference    Z. Naturforsch. 53b, 1489—1493 (1998); eingegangen am 3. Juli 1998 
  Published    1998 
  Keywords    Arene Complexes, Barium, Heterocubanes, Phosphorus, Tin 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1489.pdf 
 Identifier    ZNB-1998-53b-1489 
 Volume    53 
42Author    H. Szillat, Hk Müller-BuschbaumRequires cookie*
 Title    Uber das Erdalkalimetall-Lanthanoid  
 Abstract    Kupfer-Oxomolybdat (Cu0,22Mg0 ,78)BaNd2Mo4O 16 The Alkaline Earth R are E arth Copper-Oxomolybdate (C u 0 . 2 2 M g 0 . 7 8) B a N d 2 M o 4 O 1 6 Single crystals of (Cu0.22Mg0 78)B aN d2M o4O i6 have been prepared by crystallization from melts and investigated by X-ray methods. The compound crystallizes monoclinically, space group C ^ -C 1 2 /cl, Z = 4, a = 5.351(1), b = 12.891(2), c = 19.391(4) Ä, ß = 90.899(14)° and is isotypic to CuKHo2M o40 16. The crystal structure is dominated by B aO 10 and N d 0 8 poly-hedra forming a three-dimensional polyhedra network, which is filled by axially distorted (C u,M g)O fi octahedra and M o 0 4 tetrahedra. 
  Reference    Z. Naturforsch. 50b, 577 (1995); eingegangen am 4. Oktober 1994 
  Published    1995 
  Keywords    Crystal Structure, Copper, M agnesium, Barium, Neodymium, Molybdenum, Oxide 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0577.pdf 
 Identifier    ZNB-1995-50b-0577 
 Volume    50 
43Author    M. Ichael Schmidt, Annette Schier, Hubert SchmidbaurRequires cookie*
 Title    Magnesium Bis[D(-)-Mandelate] Dihydrate and Other Alkaline Earth, Alkali, and Zinc Salts of Mandelic Acid  
 Abstract    , and zinc D(-)mandelates have been prepared from the parent mandelic acid and equivalent quantities (1:1 / 2:1) of the corresponding metal hydroxides in water. Colourless polycrystalline products are obtained from the aqueous solutions by evaporation of the solvent. The alkali, ammonium and strontium salts are anhydrous, the calcium and barium salts are monohydrates, the magne­ sium salt is a dihydrate, and the zinc salt a trihydrate. The crystal and molecular structure of the magnesium salt has been determined by single crystal X-ray diffraction methods (mono­ clinic, space group P2i, Z = 2). The lattice contains isolated complexes with hexacoordinate magnesium atoms chelated by two mandelate anions through one of their carboxylate oxygen atoms and the alcoholic hydroxyl group. Two water molecules in cis position are completing the octahedral coordination sphere. [MgtQITO^MfTO^] is thus a true mononuclear magnesium complex. Its stability and non-hygroscopic properties suggest its use as a magnesium and/or mandelate drug. 
  Reference    Z. Naturforsch. 53b, 1098—1102 (1998); received July 23 1998 
  Published    1998 
  Keywords    Mandelic Acid, Magnesium Mandelate, Alkaline Earth Mandelates, Alkali Mandelates, Zinc Mandelate Lithium, sodium, potassium, ammonium, magnesium, calcium, strontium, barium 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1098.pdf 
 Identifier    ZNB-1998-53b-1098 
 Volume    53