Crystal and molecular structures of complexes of two isomeric 18-membered tetraaza Macrocyclic ligands having the empirical formula [CuC20H40N4](ClO4)2. Effects of chelate ring size and double-bond placement on coordination geometry about copper(II)

1980 ◽  
Vol 19 (8) ◽  
pp. 2331-2338 ◽  
Author(s):  
James H. Timmons ◽  
Phil Rudolf ◽  
Arthur E. Martell ◽  
John W. L. Martin ◽  
Abraham Clearfield
Keyword(s):  
Double Bond ◽  
Empirical Formula ◽  
Chelate Ring ◽  
Macrocyclic Ligands ◽  
Molecular Structures ◽  
Ring Size ◽  
Coordination Geometry ◽  
Crystal And Molecular Structures ◽  
Chelate Ring Size

Di- and trimethylplatinum(IV) complexes with aspartate: some subtle effects of chelate ring size

Polyhedron ◽  
1995 ◽  
Vol 14 (19) ◽  
pp. 2613-2622 ◽  
Author(s):  
Trevor G. Appleton ◽  
John R. Hall ◽  
Trevor G. Jones ◽  
Jacqueline A. Sinkinson
Keyword(s):  
Chelate Ring ◽  
Ring Size ◽  
Chelate Ring Size

Kupfer(I)-Komplexe mit ungesättigten Stickstoffliganden, V / Kupfer(I)-Komplexe mit Diazadienen als Chelate und Brücken: Röntgenstrukturenuntersuchungen an (DAD)Cu(μ-Cl)2Cu(DAD), [(DAD)2Cu]⁺ (CuCl2)-, (DAD)CuCl, [μ-(DAD)2Cu5Cl5]n und [μ-(DAD)Cu(OTf)]n (DAD = Diazadien) / Copper(I) Complexes with Unsaturated Nitrogen Ligands, V Copper(I) Complexes with Chelating and Bridging Diazadienes: X-Ray Diffraction Studies of (DAD)Cu(μ-Cl)2Cu(DAD), [(DAD)2Cu]+ (CuCl2)-, (DAD)CuCl, [μ-(DAD)2Cu5Cl5]n and [μ-(DAD)Cu(OTf)]n (DAD = Diazadiene)

1990 ◽  
Vol 45 (10) ◽  
pp. 1369-1382 ◽  
Author(s):  
Heindirk tom Dieck ◽  
Lutz Stamp
Keyword(s):  
Coordination Polymer ◽  
Molecular Complexes ◽  
Molecular Structures ◽  
Coordination Geometry ◽  
Halide Ions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nitrogen Ligands ◽  
Crystal And Molecular Structures ◽  
Irregular Geometries

Diazadienes RN = CR′-CR′ = NR (DAD) form molecular complexes with copper(I) halides of composition (DAD)CuX, the structures of which vary from [(DAD)2Cu]+(CuCl2)⁻ with a non-tetrahedral bis(chelated) cation, over [(DAD)CuCl]2 with asymmetrically bridging chloro ligands to planar three-coordinate (DAD)CuCl. The composition of the isolated complexes depends on the relative concentrations or on the solvent. The “soft” coordination geometry of copper is underlined by the structure of the coordination polymer of composition (DAD)2Cu5Cl5, in which Cu atoms of coordination number 2, 3 and 4 and very irregular geometries are encountered and where the DAD ligands are exclusively bridging. Halide ions and sp2-nitrogen donors are very competitive. Bridging DAD ligands are also encountered in (DAD)Cu-Y with the less nucleophilic anions trifluoromethane-sulphonate or perchlorate. Crystal and molecular structures are established for all these coordination geometries and the causes are discussed for the coordination flexibility of copper(I)

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