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'Hexamethylenetetramine Complexes' in keywords Facet   section ZfN Section B  [X]
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1994 (1)
1981 (1)
1Author    Joachim PickardtRequires cookie*
 Title    Metallkomplexe mit Hexamethylentetramin als Ligand: Kristallstruktur des Cadmiumiodid-Addukts 3 Cdl2 * 2 C6H12N4 * 4 H20 Metal Complexes with Hexamethylenetetramine as Ligand: Crystal Structure of the Cadmium Iodide Adduct 3CdI2 * 2C6Hi2N4 * 4H20  
 Abstract    The reaction of aqueous solutions of cadmium iodide and hexamethylenetetramine yields crystals of an adduct 3CdI2 • 2CeHi2N4 • 4H20. The crystals are monoclinic, space group P 2i/n, Z = 2, a = 811.5(2), b = 1049.2(4), c = 1849.5(6) pm, ß = 97.73(2)°. The adduct is polymeric and may be regarded as built up from groups of two tetrahedrally and one octahedrally coordinated Cd(II) ions in which the tetrahedra and the octahedron are sharing common iodine atoms at the corners; neighbourirg Cd a units are interlinked by hexamethylenetetramine molecules. 
  Reference    Z. Naturforsch. 36b, 1225—1227 (1981); eingegangen am 4. Mai 1981 
  Published    1981 
  Keywords    Hexamethylenetetramine Complexes, Cadmium Iodide Adduct, Crystal Structure 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1225.pdf 
 Identifier    ZNB-1981-36b-1225 
 Volume    36 
2Author    Mit Unterschiedlich, Koordinierten Zinkionen, Joachim Pickardt, Gill-Taik Gong, Sabine Wischnack, Christina SteinkopffRequires cookie*
 Title    Kristallstruktur zweier Zinkthiocyanat-Hexamethylentetramin-Addukte, Zn(SCN)2» (Q H ^N,), und {Zn(SCN)2 C6HnN4 2H 20}(SCN)2-(C6H 12N4)2, and {Zn(SCN)2-C6H 12N4-2H 20}", with Differently Coordinated Zinc Ions  
 Abstract    of the adducts Zn(SCN),-(C6H12N4)2 (1), and {Zn(SCN)2-C6H 12N4-2H20}" (2) were obtained by crystallization from aqueous solutions containing hexamethylenetetrami­ ne, potassium thiocyanate and zinc nitrate or zinc sulfate, resp., under identical conditions, as two totally different products. 1 crystallizes orthorhombically, space group P nmm, Z -2, a -622.4(5), b -1152.3(7), c = 1394.0(9) pm; 2 is monoclinic, space group C2/c, a = 984.4(3), b = 1217.0(5), c = 1257.4(6) pm, andß = 111.69(5)°. The crystal structure of 1 contains discrete molecules of the complex, in which the zinc ion is tetrahedrally coordinated by two NCS li­ gands, and two hexamethylenetetramine molecules, which act as monodentate ligands. In 2 however, the zinc ions are octahedrally coordinated. A "supramolecular" structure is form­ ed: The hexamethylenetetramine molecules act as bridging bidentate ligands and connect [Zn(H20) 2(NCS)2] units forming zig-zag chains. Adjacent chains are interconnected via hydrogen bonds. The formation of the two compounds with different coordination may be due to the fact, that the educts Zn(N03)2-4H20 and ZnS04-7H20 contain Zn(H20) 4 and Zn(H20) 6 moieties, resp., and that these species are retained in solution. 
  Reference    Z. Naturforsch. 49b, 325—329 (1994); eingegangen am 24. August 1993 
  Published    1994 
  Keywords    Hexamethylenetetramine Complexes, Zinc Thiocyanate Adducts, Crystal Structure Crystals 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0325.pdf 
 Identifier    ZNB-1994-49b-0325 
 Volume    49