The neutral cluster amminehexa-μ2-chlorido-μ4-oxido-tris(1,4,6-triazabicyclo[3.3.0]oct-4-ene)tetracopper(II)
摘要:
The title compound, [Cu4Cl6O(C5H9N3)(3)(NH3)], 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.