Competing magnetic interactions in a dinuclear Ni(II) complex: Antiferromagnetic O-H...O moiety and ferromagnetic N3-ligand

Article Abstract:

The existence of ferromagnetic interactions between Ni(II) centers via N3-ligands and antiferromagnetic interactions through the H-bonded moiety are revealed by the synthesis, structural characteristics, magnetic studies and DFT calculations in Ni(II) dinuclear complexes containing two bridging N3- and an O-H...O linkage. The magnetic behavior of the system depends on the delicate balance between these two competing interactions.

Nickel Compounds, Hydrogen bonding, Hydrogen bonds, Ligands, Ligands (Chemistry), Magnetic properties

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Aromatic superclusters from all-metal aromatic and antiaromatic monomers [[Al4].sup.2-] and [[Al4].sup.4-]

Article Abstract:

Study is presented to show that dimers of all-metal aromatic/anti-aromatic clusters form extremely stable superclusters unlike their organic counterparts. A hypothesis that the Al8 clusters are aromatic and should be ideal candidates for experimental isolation through mass-spectrometric measurements is presented.

Surface active agents, Surface Active Agent Manufacturing, Analysis, Optical properties, Density functionals, Density functional theory, Structure, Potential energy

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Synthesis, structure, and magnetic properties of a novel pillared layered iron(III) arsenate, [[4,4'-bpy[H.sub.2]].sub.3][[Fe.sub.9][([H.sub.2]O).sub.6][F.sub.3][(HAs[O.sub.4]).sub.12][(As[O.sub.4]).sub.2]].2[H.sub.2]O

Article Abstract:

The study explains the synthesis, structure and magnetic properties of a three-dimensional iron(III) arsenate, [[4,4'-bpy[H.sub.2]].sub.3][[Fe.sub.9][([H.sub.2]O).sub.6][F.sub.3][(HAs[O.sub.4]).sub.12][(As[O.sub.4]).sub.2]].2[H.sub.2]O.

Arsenic & Compounds, Technology application, Arsenic compounds, X-rays, X-ray diffraction, Ferromagnetism, Iron compounds

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