1,659 research outputs found
The Zeros of Orthogonal Polynomials for Jacobi-Exponential Weights
This paper gives the estimates of the zeros of orthogonal polynomials for Jacobi-exponential weights
Di-μ-chlorido-bisÂ{[1,2-bisÂ(pyridin-2-ylmethÂoxy)benzene-κ4 N,O,O′,N′]chloridocadmium}
In centrosymmetric dinuclear title compound, [Cd2Cl4(C18H16N2O2)2], the CdII atom is seven-coordinated in a pentaÂgonal–bipyramidal environment defined by two N atoms and two O atoms from one ligand and three Cl− anions, two of which are bridging. A π–π interÂaction between adjacent pyridine rings [centroid–centroid distance = 3.773 (1) Å] further stablizes the dimer
catena-Poly[[bisÂ(nitrato-κO)cadmium]bisÂ[μ-1,4-bisÂ(pyridin-3-ylÂmethÂoxy)benzene-κ2 N:N′]]
In the title compound, [Cd(NO3)2(C18H16N2O2)2]n, the six-coordinated CdII ion is located on an inversion center and has a distorted octaÂhedral environment defined by four N atoms from four 1,4-bisÂ(pyridin-3-ylmethÂoxy)benzene ligands and two O atoms from two nitrate anions. The ligands link the CdII ions into a ribbon-like structure running along [201]. One O atom of the nitrate anion is disordered over two positions with site-occupancy factors of 0.59 (2) and 0.41 (2)
Investigating the topological structure of quenched lattice QCD with overlap fermions by using multi-probing approximation
The topological charge density and topological susceptibility are determined
by multi-probing approximation using overlap fermions in quenched SU(3) gauge
theory. Then we investigate the topological structure of the quenched QCD
vacuum, and compare it with results from the all-scale topological density, the
results are consistent. Random permuted topological charge density is used to
check whether these structures represent underlying ordered properties.
Pseudoscalar glueball mass is extracted from the two-point correlation function
of the topological charge density. We study ensembles of different lattice
spacing with the same lattice volume , the results are
compatible with the results of all-scale topological charge density, and the
topological structures revealed by multi-probing are much closer to all-scale
topological charge density than that by eigenmode expansion.Comment: 12 pages,34 figure
catena-Poly[[bisÂ(nitrato-κO)copper(II)]-bisÂ[μ-1,4-bisÂ(pyridin-3-ylmethÂoxy)benzene-κ2 N:N′]]
In the title compound, [Cu(NO3)2(C18H16N2O2)2]n, the CuII ion lies on an inversion center and is six-coordinated in a Jahn–Teller-distored octaÂhedral geometry defined by four N atoms of the pyridine derivative forming a square plane, above and below which are the O atoms of the nitrate anion. The ligand links the metal atoms linto a linear chain running along the a axis. One of the nitrate O atoms is equally disordered over two sets of sites
[1,2-Bis(pyridin-2-ylmethÂoxy)benzene-κ4 N,O,O′,N′]bisÂ(nitrato-κO)cobalt(II)
In the title compound, [Co(NO3)2(C18H16N2O2)], the CoII ion is six-coordinated in a distorted octaÂhedral environment defined by two O and two N atoms from the ligand and by two O atoms from two nitrate anions. A two-dimensional network parallel to the ab plane is built up by C—H⋯O hydrogen bonds, which link adjacent molÂecules in the crystal structure
catena-Poly[[bisÂ(nitrato-κO)cobalt(II)]-bisÂ[μ-1,4-bisÂ(pyridin-3-ylmethÂoxy)benzene-κ2 N:N′]]
In the title compound, [Co(NO3)2(C18H16N2O2)2]n, the CoII ion is located on an inversion center and is six-coordinated in an octaÂhedral environment defined by four N atoms of the pyridine rings and two O atoms of the nitrate anions. The ligands link the CoII ions into a linear chain running along [201]. One O atom of the nitrate ligand is disordered over two positions with site-occupancy factors of 0.59 (4) and 0.41 (4)
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