title: Synthesis of small tetranuclear Cu(I) metallacycles based on bridging pseudohalogenide ions.
abstract: Three new 'short' metallacycles are selectively obtained from the reaction of a bimetallic Cu(I) 'U-shape' molecular clip with, respectively, the cyano CN(-), tricyanomethanide C(CN)(3)(-), and azido N(3)(-) pseudohalogenide ions. These supramolecular assemblies have been characterized by spectroscopic methods, single-crystal X-ray diffraction, and elemental analysis. The single-crystal X-ray structures of these complexes reveal no short contact interaction between the pseudohalogenide ions within these self-assembled structures despite the short Cu(I)···Cu(I) distances within the molecular clips. The formation of these discrete metallacycles is rationalized by analyzing the structural features of the Cu(I) 'U-shape' molecular clip.
authors: Sciences Chimiques de Rennes UMR 6226 CNRS- Université de Rennes 1, Campus de Beaulieu 35042 Rennes, Cedex, France.
authors: Volodymyr
authors: V
authors: Vreshch
authors: Brigitte
authors: B
authors: Nohra
authors: Christophe
authors: C
authors: Lescop
authors: Régis
authors: R
authors: Réau
mesh_terms: D001386:Azides / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003486:Cyanides / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D009570:Nitriles / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D001386:Azides; D003486:Cyanides; D007477:Ions; D009570:Nitriles; D009942:Organometallic Compounds; D003300:Copper