The Cleavage of Bonds of Low-Valent Transition Metal Ions. The HOmogeneous Dehalogenation of Vicinal Dihalides by Chromous Sulfate

1964 ◽  
Vol 86 (21) ◽  
pp. 4603-4608 ◽  
Author(s):  
W. C. Kray ◽  
C. E. Castro
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Low Valent

Higher stability constants for complexation of low valent, than of high valent, transition metal ions by saturated tertiary amine macrocyclic tetraaza ligands

1991 ◽  
Vol 182 (2) ◽  
pp. 131-133 ◽  
Author(s):  
Dirk Guldi ◽  
Fritz Wasgestian ◽  
Esther Zeigerson ◽  
Dan Meyerstein
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Stability Constants ◽  
Tertiary Amine ◽  
Transition Metal Ions ◽  
Low Valent ◽  
High Valent ◽  
Macrocyclic Tetraaza

The Reduction of Multiple Bonds by Low-Valent Transition Metal Ions. The Homogeneous Reduction of Olefins by Chromous Sulfate

1966 ◽  
Vol 88 (21) ◽  
pp. 4964-4969 ◽  
Author(s):  
C. E. Castro ◽  
R. D. Stephens ◽  
Steve Mojé
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Multiple Bonds ◽  
Homogeneous Reduction ◽  
Low Valent

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

Binary and ternary complexes of some inner transition metal ions with amino acids and acetyl acetone

1998 ◽  
Vol 95 (5) ◽  
pp. 1068-1090 ◽  
Author(s):  
R. H. Abu-Eittah ◽  
M. M. Abdou ◽  
M. B. Salem
Keyword(s):  
Amino Acids ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Ternary Complexes ◽  
Binary And Ternary Complexes ◽  
Acetyl Acetone

EPR of Transition-Metal Ions on the Surfaces ofγ-Al2O3, ZnO and Mg(OH)2

1990 ◽  
Vol 166 (Part_2) ◽  
pp. 233-248 ◽  
Author(s):  
T. Böttjer ◽  
G. Lehmann
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions

Synthesis, Spectral and Antimicrobial Investigation of 2-(Naphthalenel-ylamino)-2- Phenylacetonitrile and 1, 10-Phenanthroline with Five Divalent Transition Metal Ions

2019 ◽  
Vol 10 (01) ◽  
Author(s):  
Mohammed Al-Amery1 ◽  
Ashraf Saad Rasheed ◽  
Dina A. Najeeb
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Molar Conductance ◽  
Octahedral Geometry ◽  
Mixed Ligand ◽  
Gram Negative Bacteria ◽  
Magnetic Studies ◽  
Gram Positive Bacteria

Five new mixed ligand metal complexes have been synthesized by the reaction of divalent transition metal ions (Hg, Ni, Zn, Cu and Cd) with 2-(naphthalen-l-ylamino)-2-phenylacetonitrile (L1 ) and 1,10-phenanthroline (L2). The coordination likelihood of the two ligands toward metal ions has been suggested in the light of elemental analysis, UV-Vis spectra, FTIR, 1H-NMR, flam atomic absorption, molar conductance and magnetic studies. Results data suggest that the octahedral geometry for all the prepared complexes. Antibacterial examination of synthesized complexes in vitro was performed against four bacterias. Firstly, Gram-negative bacteria namely, Pseudomonas aerugin and Escherichia. Secondly, Gram-positive bacteria namely, Bacillus subtilis, Staphylococcuaurouss. Results data exhibit that the synthesized complexes exhibited more biological activity than tetracycline pharmaceutical.

Bond-length distributions for ions bonded to oxygen: Metalloids and post-transition metals

2017 ◽  
Author(s):  
Olivier Charles Gagné ◽  
Frank Christopher Hawthorne
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Metal Ions ◽  
Bond Length ◽  
Lone Pair ◽  
Transition Metal Ions ◽  
Oxygen Lone Pair

Bond-length distributions are examined for thirty-three configurations of the metalloid ions and fifty-six configurations of the post-transition-metal ions bonded to oxygen. Lone-pair stereoactivity is discussed.

Sign in / Sign up

Export Citation Format

Share Document