Results 261 to 270 of about 34,772 (314)

Neutron scattering from ammonium salts. II. Reorientational motion of ammonium ions in octahedral environments

open access: closedJournal of Physics C: Solid State Physics, 1979
For pt.I see ibid., vol.12, p.209 (1979). Neutron scattering from NH4I at room temperature and (NH4)0.16K0.84I and (NH4)0.16K0.84Br from 98K to room temperature are reported. Measurements using a fixed elastic window technique show that reorientation rates of NH4+ ions in all the salts are fast ( tau approximately 5 ps) and similar at room temperature.
P. S. Goyal, B.A. Dasannacharya
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Local tetragonal distortions of the octahedral environment for substituting Cr3+, Mn2+ and Fe3+ ions in Rb2ZnF4 crystals

open access: closedPhysica B: Condensed Matter, 1997
The local tetragonal distortions of complexes MF6 formed in Rb2ZnF4 crystals by substitution of Cr3+, Mn2+ and Fe3+ for Zn2+ have been determined from their EPR data. The results are discussed and the intrinsic tetragonal distortion of the host Rb2ZnF4 crystal is assumed.
Wen‐Chen Zheng
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The NMR chemical shift for a 5d1 system in a crystal-field environment of octahedral symmetry

open access: closedJournal of Magnetic Resonance (1969), 1987
Abstract From the electronic wavefunctions for 5d orbitals expressed in a common coordinate system, the radial part of the integrals and angular part of the hyperfine interaction integrals are evaluated and expressed in analytical forms. General formulas for the NMR chemical shifts arising from the 5d electron orbital angular momentum and the 5d ...
Sang-Woon Ahn, Se Woung Oh
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Modeling Spin Interactions in a Cyclic Trimer and a Cuboidal Co4O4 Core with Co(II) in Tetrahedral and Octahedral Environments

open access: closedJournal of the American Chemical Society, 2005
The X-ray crystallographic structures, the magnetic susceptibilities from 2 to 300 K, and a theoretical analysis of the magnetism for a triangular and a tetranuclear molecule consisting of linked high-spin cobalt(II) centers are described. The interpretation of the magnetic data for the triangular compound [Co(depa)Cl](3) (depa is the anion of 2,2 ...
John F. Berry   +7 more
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A simple model for predicting the electronic configuration of a dn ion in a tetragonally distorted octahedral environment

open access: closedProceedings / Indian Academy of Sciences, 1984
A simple, but general model which enables prediction of the electronic structure adopted by ad n ion in an axially distorted octahedron of ligands (D 4h) is described. The variousd n configurations (n = 1 to 9) are briefly reviewed with some recent results concerning the stabilization of unusual electronic configurations or oxidation states in oxides.
B. Buffat   +3 more
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Trivalent Holmium in an Octahedral Cl3O3 Environment: Synthesis, Crystal Structure and Hirshfeld Surfaces of Coordination Compound with 2,2,2-Trichloro-N-(dimorpholinophosphoryl)acetamide

open access: closedJournal of Chemical Crystallography, 2020
The reaction of HoCl3·6H2O with 2,2,2-trichloro-N-(dimorpholinophosphoryl)acetamide (carbacylamidophosphate (CAPh) type ligand, C10Cl3H8N3O4P, HL) in acetone-isopropanolic solution produces the title coordination compound [Ho(HL)2(H2O)Cl3] (1). The complex with a low for lanthanides coordination number 6 crystallizes in the triclinic space group P
Olena O. Litsis   +5 more
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Manganese(III) in a pseudo-compressed mixed-donor octahedral environment: synthesis, X-ray crystal structure and physicochemical properties

open access: closedPolyhedron, 2001
Abstract The compound [C5H10NH2][MnL2] [H2L=N-(2-hydroxynaphthalen-1-yl)sarcosine] has been synthesised and characterised using single-crystal X-ray crystallography, spectroscopy and magnetic susceptibility measurements. The crystallographic asymmetric unit displays two similar, independent [MnL2]− complex ions linked via piperidinium cations through
Musa S. Shongwe   +5 more
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