title: Structure and magnetic properties of a hydroxo-bridged copper(II) distorted cubane stabilized via supramolecular hydrogen bonding with an ionic hexafluoroacetylacetonate.
abstract: Tetranuclear [Cu(II)4(OH)4(aib)4)](hfac)4 (1; aib = 2-methyl-2-amino-4-iminopentane; hfac = hexafluoroacetylacetonate) forms from the reaction of aqueous ammonia and Cu(hfac)2.2H2O in acetone. The structure of 1 reveals that four noncoordinating hfac- counterions stabilize the distorted cubane complex via multiple H-bonding contacts. Magnetic susceptibility studies reveal that cubane-like 1 is best described as a pair of independent antiferromagnetically coupled dimers with g = 2.10 and J/kB = -298 K (207 cm(-1)) (H = -2JS1.S2).
authors.affiliation: Department of Chemistry, University of Utah, 315 South 1400 East Street, Room 2020, Salt Lake City, Utah 84112-0850, USA.
authors.forename: Nazario
authors.initials: N
authors.lastname: Lopez
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Vos
authors.forename: Atta M
authors.initials: AM
authors.lastname: Arif
authors.forename: William W
authors.initials: WW
authors.lastname: Shum
authors.forename: Juan C
authors.initials: JC
authors.lastname: Noveron
authors.forename: Joel S
authors.initials: JS
authors.lastname: Miller
mesh_terms: D000465:Algorithms; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry*; D006860:Hydrogen Bonding; D008958:Models, Molecular; D010422:Pentanones / Q000737:chemistry*
chemical_list: D006845:Hydrocarbons, Fluorinated; D010422:Pentanones; C518705:hexafluoroacetylacetonate; D003300:Copper