Spectral and Magnetic Properties of Hydroxo Complexes. The Position of the Hydroxide Ion in the Spectrochemical Series

1965 ◽  
Vol 4 (7) ◽  
pp. 1088-1089 ◽  
Author(s):  
William E. Hatfield ◽  
John F. Anders ◽  
Louis J. Rivela
Keyword(s):  
Magnetic Properties ◽  
Hydroxide Ion ◽  
Hydroxo Complexes ◽  
Spectrochemical Series

Synthesis of nickel selenites, their solubility and bonding in them

1982 ◽  
Vol 47 (8) ◽  
pp. 2069-2076 ◽  
Author(s):  
Miroslav Ebert ◽  
Zdeněk Mička ◽  
Ilona Peková
Keyword(s):  
Magnetic Properties ◽  
Hydrogen Bonding ◽  
Solubility Diagram ◽  
Reflectance Spectroscopy ◽  
Chloride Anion ◽  
Fluoride Anion ◽  
Infrared Absorption Spectroscopy ◽  
Magnetic Parameters ◽  
Nickel Cation ◽  
Spectrochemical Series

The solubility diagram of the NiSeO3-SeO2-H2O system at 25 °C was studied, and on its basis, Ni(HSeO3)2.2 H2O was prepared. This selenite and NiSeO3.2 H2O were investigated by infrared absorption spectroscopy and by electronic reflectance spectroscopy and their magnetic properties were determined. Based on the infrared spectra, the force constants of the selenium-oxygen bonds were determined and the hydrogen bonding was characterized. The electronic reflectance spectra and the magnetic parameters indicate an octahedral arrangement of the coordination sphere of the nickel cation and characterize the selenite anion as a ligand that in the spectrochemical series assumes a position between the fluoride anion and water and in the nephelauxetic series, between ethylenediamine and the chloride anion.

First examples of carbacylamidophosphate pentanuclear hydroxo-complexes: Synthesis, structure, luminescence and magnetic properties

Polyhedron ◽  
2016 ◽  
Vol 106 ◽  
pp. 44-50 ◽  
Author(s):  
Nataliia S. Kariaka ◽  
Julia A. Rusanova ◽  
Sergii S. Smola ◽  
Sergey V. Kolotilov ◽  
Kateryna O. Znovjyak ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Hydroxo Complexes

Complexes of cobalt(II) halides with 4-methylpyridine and 2-methylpyridine

1965 ◽  
Vol 18 (4) ◽  
pp. 507 ◽  
Author(s):  
DP Graddon ◽  
EC Watton
Keyword(s):  
Magnetic Properties ◽  
Infrared Spectra ◽  
Visible Region ◽  
The Other ◽  
Free Base ◽  
Electron Pairs ◽  
Relative Stabilities ◽  
The One ◽  
Spectrochemical Series ◽  
Bonding Electron

Complexes of CoCl2, CoBr2, CoI2, and Co(NCS)2 with two and four molecules of 4-methylpyridine and two molecules of 2-methylpyridine have been prepared. Their magnetic properties, conductivities, and reflectance and absorption spectra in the visible region show that all the compounds of the type CoX2B2 are tetrahedral except Co(NCS)2(4-mepy)2, which is an octahedral polymer like its pyridine analogue. Infrared spectra in the 3-15 μ region lend no support to the suggestion that there may be differences in the extent of π-bonding between the metal and the base or the metal and NCS- in tetrahedral and octahedral complexes. It is suggested that the position of the ligands in the spectrochemical series and the relative stabilities of the compounds CoX2B2 with respect to dissociation into CoX2B4 and free base can be explained in terms of repulsion effects between the non-bonding electron pairs on the ligands and metal dє-orbitals on the one hand and the non-bonding electron pairs of neighbouring ligands on the other.

Structures and Spectral and Magnetic Properties of a Series of Carbacylamidophosphate Pentanuclear Lanthanide(III) Hydroxo Complexes

2019 ◽  
Vol 58 (21) ◽  
pp. 14682-14692 ◽  
Author(s):  
Nataliia S. Kariaka ◽  
Sergey V. Kolotilov ◽  
Paula Gawryszewska ◽  
Ewa Kasprzycka ◽  
Marek Weselski ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Hydroxo Complexes

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Microstructure in soft magnetic E3 (S1, Al) (Sendust) alloys

1988 ◽  
Vol 46 ◽  
pp. 770-771
Author(s):  
June D. Kim
Keyword(s):  
Electron Microscopy ◽  
Magnetic Properties ◽  
Ternary Phase Diagram ◽  
Vertical Tube ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Soft Magnetic ◽  
Quenching Temperature ◽  
Thin Foils ◽  
Vertical Tube Furnace

Iron-base alloys containing 8-11 wt.% Si, 4-8 wt.% Al, known as “Sendust” alloys, show excellent soft magnetic properties. These magnetic properties are strongly dependent on heat treatment conditions, especially on the quenching temperature following annealing. But little has been known about the microstructure and the Fe-Si-Al ternary phase diagram has not been established. In the present investigation, transmission electron microscopy (TEM) has been used to study the microstructure in a Sendust alloy as a function of temperature.An Fe-9.34 wt.% Si-5.34 wt.% Al (approximately Fe3Si0.6Al0.4) alloy was prepared by vacuum induction melting, and homogenized at 1,200°C for 5 hrs. Specimens were heat-treated in a vertical tube furnace in air, and the temperature was controlled to an accuracy of ±2°C. Thin foils for TEM observation were prepared by jet polishing using a mixture of perchloric acid 15% and acetic acid 85% at 10V and ∼13°C. Electron microscopy was performed using a Philips EM 301 microscope.

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