title: π-Excess aromatic σ²-P ligands: synthesis and structure of an unprecedented μ²-P-1,3-benzazaphosphole bridged tetranuclear copper(I) acetate complex.
abstract: The -P=CH-NR-heterocycle 1-neopentyl-1,3-benzazaphosphole (npBAP) reacts in THF with copper(I) acetate via labile soluble complexes (npBAP)xCuOAc preferably to form the insoluble tetranuclear (npBAP)2(CuOAc)4 complex 1. The crystal structure analysis of 1·2CH2Cl2, grown from CH2Cl2-hexane, reveals two μ(2)-P coordinated ligands, folding the Cu4 ring with each two short distances of the cyclic copper(I) acetate tetramer to a butterfly arrangement. AIM analysis of the ωB97-D/6-31+G* electron density, obtained at the crystal structure geometry, shows bond critical points between the copper atoms indicating covalent bonding interactions between the neighboring Cu atoms.
authors.affiliation: Institut für Biochemie (Anorganische Chemie), E.-M.-A.-Universität Greifswald, 17487 Greifswald, Germany. heinicke@uni-greifswald.de.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Ghalib
authors.forename: László
authors.initials: L
authors.lastname: Könczöl
authors.forename: László
authors.initials: L
authors.lastname: Nyulászi
authors.forename: Gottfried J
authors.initials: GJ
authors.lastname: Palm
authors.forename: Carola
authors.initials: C
authors.lastname: Schulzke
authors.forename: Joachim W
authors.initials: JW
authors.lastname: Heinicke
mesh_terms: D008024:Ligands; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D009943:Organophosphorus Compounds; C015092:cupric acetate