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1995 (1)
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1Author    Borislav Bogdanović, G. Udrun, K. Oppetsch, Carl Krüger, RichardM. YnottRequires cookie*
 Title    Magnesiumorganische Innerkomplexe, Teil II [1] Ethyl(dialkylaminoalkyl)-und Ethyl(4-alkoxybutyl)magnesium-Verbindungen Organomagnesium Inner Complexes, Part II [1] Ethyl(dialkylam inoalkyl)-and Ethyl(4-alkoxybutyl)magnesium Compounds  
 Abstract    The reaction o f bis(dialkylam inoalkyl)-and bis(4-alkoxybutyl)m agnesium inner com plexes with M gEt2 leads to the form ation of ethyl(dialkylam inoalkyl)-and ethyl(4-alkoxybutyl)m agnesium com pounds. The X -ray crystal structures o f ethyl(3-N ,N -dim ethylam inopropyl)m agnesium and ethyl(3-N -cyclohexyl-3-N -m ethylam inopropyl)m agnesium confirm that the com pounds are dim eric with the a-C -atom o f the chelating ligand bridging the magnesium atoms. The difference in reactivity of the M g —Et and M g—C"H2nX bonds (X = NR 'R ", O R) makes itself apparent in the reaction of these com plexes with ethylene: up to six ethylene m olecules are inserted, whereby in the case of the ethyl(4-alkoxybutyl)m agnesium com pounds insertion occurs preferentially into the M g—Et bond w hereas in the case o f the ethyl(dialkylam inoalkyl)m agne-sium com pounds both bonds are equally reactive. 
  Reference    Z. Naturforsch. 41b, 617 (1986); eingegangen am 21. N ovem ber 1985 
  Published    1986 
  Keywords    M agnesium, Inner C om plexes, Crystal Structures 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0617.pdf 
 Identifier    ZNB-1986-41b-0617 
 Volume    41 
2Author    Viktor Keimes, Albrecht MewisRequires cookie*
 Title    Strukturvarianten des MgCu2 -Typs: Die Verbindungen Mg2 Ni3P und Mg2 Ni3As  
 Abstract    Variants of the M gC u2 Type: The C om pounds M g2N i3P and M g2N i3As The com pounds M g2N i3P and M g2N i3A s were prepared by heating the elements. Their structures have been determined from single-crystal X-ray data. The structure o f the phosphide is a rhombohedral ternary variant o f the cubic Laves structure type M gCu2 (R 3m ; hexagonal lattice constants: a = 4.971(0)Ä , c = 10.961 (2) Ä). The ordered substitution o f one quarter o f the metal atom s by phosphorus and the resulting shorter distances are responsible for the rhombohedral symmetry. The arsenide crystallizes in the M gC u2 type structure (F d3m ; a = 6.891(1)A , com position M g2N i3A s) with a statistic distribution o f the N i and As atoms; the relevant hom ogeneity range extends from M g2N i2 9A s , , to M g2N i3 5A s0 5. 
  Reference    Z. Naturforsch. 47b, 1351—1354 (1992); eingegangen am 23. März 1992 
  Published    1992 
  Keywords    M agnesium, N ickel, Phosphide, Arsenide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1351.pdf 
 Identifier    ZNB-1992-47b-1351 
 Volume    47 
3Author    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