title: The neutral cluster amminehexa-mu(2)-chlorido-mu(4)-oxido-tris(1,4,6-triazabicyclo[3.3.0]oct-4-ene)tetracopper(II).
abstract: The title compound, [Cu(4)Cl(6)O(C(5)H(9)N(3))(3)(NH(3))], is a neutral conformationally chiral cluster which crystallizes under the conditions described in this paper as a racemic conglomerate. It contains four Cu(II) atoms in a tetrahedral coordination with a central O atom lying on a crystallographic threefold axis. Six chloride anions bridge the four Cu(II) atoms. Three Cu(II) atoms are bound by an N atom of a monodentate 1,4,6-triazabicyclo[3.3.0]oct-4-ene (Htbo) ligand and the remaining Cu(II) atom is bound by a terminal ammine ligand. The geometry at each copper center is trigonal bipyramidal, produced by the bound N atom of Htbo or ammonia, the O atom in the axial position, and three chloride ions in the equatorial plane. The chloride anions form an octahedron about the oxygen center. The copper-ammonia bond lies along the crystallographic threefold axis, along which the molecules are packed in a polar head-to-tail fashion.
authors.affiliation: Department of Chemistry, Texas A&M University, PO Box 3255, College Station, Texas 77843-3255, USA.
authors.forename: Gina M
authors.initials: GM
authors.lastname: Chiarella
authors.forename: Doris Y
authors.initials: DY
authors.lastname: Melgarejo
authors.forename: John P
authors.initials: JP
authors.lastname: Fackler
mesh_terms: D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; C543552:aminehexa-mu(2)-chlorido-mu(4)-oxido-tris(1,4,6-triazabicyclo(3.3.0)oct-4-ene)tetracopper(II); D003300:Copper