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'Transition Metal Complexes' in keywords Facet   Publication Year 1999  [X]
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1Author    Rainer Mattes, Ulrich VoetRequires cookie*
 Title    Komplexe zweier vierzehngliedriger Tetraazadibenzo-Makrocyclen. Strukturen eines freien Liganden und von Nickel(II)-, Kupfer(II)-und Zink(II)-Komplexen Complexes o f Two 14-Membered N4 Dibenzo Macrocycles. Crystal Structures o f a Free Ligand and o f Nickel(II), Copper(II) and Zinc(II) Complexes  
 Abstract    The syntheses and structural characterizations of complexes of two 14-membered macrocy­ clic trans-N4 dibenzo ligands, 5,7,8,9,14,16,17,18-octahydrodibenzo[e,l]-[l,4,8,l ll-tetraaza-cyclotetradecine-6,15-dimethyl (L3) resp. -6,15-diacetamide (L4), are presented. The crystal structures of five compounds have been determined by single crystal X-ray diffraction. The free ligand L3 has a saddle-shaped structure with intramolecular hydrogen bonds. This conformation of the ligand exists also in the Zn(II) complex in which the metal ion is five-coordinated with the metal center outside the cavity. The coordination polyhedron is intermediate between a trigonal bipyramid and a square pyramid. In c/5-[Ni(L3)(NCS)2] the ligand is folded along an N- • N axis. The nickel ion in this complex shows an approximate octahedral geometry. For Ni(II) and Cu(II) complexes of ligand L the overall geometry is also distorted octahedral. The folding of the ligand causes a d s-N 40 2 coordination. 
  Reference    Z. Naturforsch. 54b, 321—328 (1999); eingegangen am 6. Oktober 1998 
  Published    1999 
  Keywords    Macrocyclic N4-Donor Ligands, Transition Metal Complexes, Crystal Structure 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0321.pdf 
 Identifier    ZNB-1999-54b-0321 
 Volume    54