5,363 research outputs found
(Benzoato-κO)(benzoic acid-κO)(4,4′-dimethyl-2,2′-bipyridine-κ2 N,N′)hydroxidocopper(II) monohydrate
In the structure of the title complex, [Cu(C7H5O2)(OH)(C12H12N2)(C7H6O2)]·H2O, the CuII ion is pentacoordinated in a tetragonal-pyramidal geometry with one O atom of a hydroxide group, one O atom of a benzoate anion and two N atoms of a 4,4′-dimethyl-2,2′-bipyridine ligand occupying the basal plane, and one O atom of a benzoic acid molecule located at the apical site. The title complex was refined with a metal-coordinated OH group and a ‘free’ benzoic acid molecule, although it can be assumed that the proton is delocalized between the OH and the COOH group. The uncoordinated water molecule is equally disordered over two positions. The structure displays O—H⋯O hydrogen bonding
Dibenzoato-κO;κ2 O,O′-(6,6′-dimethyl-2,2′-bipyridine-κ2 N,N′)zinc(II)–benzoic acid (1/1)
In the crystal structure of the title compound, [Zn(C6H5COO)2(C12H12N2)]·C6H5COOH, the Zn atom is pentacoordinated in distorted square-pyramidal geometry by two O atoms of a benzoate anion and two N atoms of a 6,6′-dimethyl-2,2′-bipyridine ligand occupying the basal plane and an O atom of another benzoate anion located at the apical site. In the crystal structure, intermolecular O—H⋯O and C—H⋯O hydrogen bonds and C—H⋯π interactions are present
Di-μ-chlorido-bis[(2′-carboxybiphenyl-2-carboxylato-κO)(2,2′:6′,2′′-terpyridine-κ3 N,N′,N′′)cadmium(II)] hemihydrate
In the centrosymmetric dinuclear title compound, [Cd2(C14H9O4)2Cl2(C15H11N3)2]·0.5H2O, each of the CdII ions is coordinated by three N atoms from a chelating 2,2′:6′,2′′-terpyridine ligand, two bridging Cl atoms and one O atom of a 2′-carboxy-[1,1′-biphenyl]-2-carboxylate anion. The coordination environment is distorted octahedral. In the crystal, intermolecular O—H⋯O hydrogen bonds link symmetry-related molecules, forming an infinite chain. The half-occupancy water molecule is disordered over two general sites with 0.25 occupancy and is, in turn, disordered over an inversion center
Interacting heavy fermions in a disordered optical lattice
We have theoretically studied the effect of disorder on ultracold
alkaline-earth atoms governed by the Kondo lattice model in an optical lattice
via simplified double-well model and hybridization mean-field theory.
Disorder-induced narrowing and even complete closure of hybridization gap have
been predicted and the compressibility of the system has also been investigated
for metallic and Kondo insulator phases in the presence of the disordered
potential. To make connection to the experimental situation, we have
numerically solved the disordered Kondo lattice model with an external harmonic
trap and shown both the melting of Kondo insulator plateau and an
compressibility anomaly at low-density
5-(4-Methylphenyl)-1,3,4-oxadiazol-2-amine
In the crystal structure of the title compound, C9H9N3O, adjacent molecules are linked through N—H⋯N hydrogen bonds into a three-dimensional network
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