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Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
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Valence Interconversion of Octahedral Nickel(II/III/IV) Centers
Masahiro Kouno1, Nobuto Yoshinari1, Naoto Kuwamura1
1Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
Angewandte Chemie (International Ed. in English)
|August 29, 2017
Summary
Researchers stabilized three nickel oxidation states (+2, +3, +4) in a novel RhNiRh complex. These states were interconvertible, showing distinct color, magnetic, and structural changes.
Area of Science:
- Inorganic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Nickel complexes with octahedral coordination are crucial in catalysis and materials.
- Stabilizing multiple oxidation states in a single complex presents synthetic challenges.
- Trinuclear complexes offer unique electronic and structural properties.
Purpose of the Study:
- To synthesize and characterize a novel RhNiRh trinuclear complex.
- To stabilize and investigate three distinct oxidation states of an octahedral nickel center.
- To explore the interconversion between these oxidation states and associated property changes.
Main Methods:
- Synthesis of the [Ni{Rh(apt)3 }2 ]n+ complex (apt=3-aminopropanethiolate).
- Characterization using single-crystal X-ray crystallography.
- Spectroscopic, electrochemical, and magnetic measurements to analyze oxidation states and properties.
Main Results:
- Successfully stabilized three oxidation states (+2, +3, +4) of the central nickel ion.
- Demonstrated interconvertibility between the nickel oxidation states.
- Observed changes in color, magnetism, and Jahn-Teller distortion upon oxidation state conversion.
Conclusions:
- The RhNiRh trinuclear complex provides a platform for stabilizing multiple nickel oxidation states.
- Interconversion of oxidation states is accompanied by significant physical property changes.
- This study offers insights into the redox behavior and structural dynamics of polynuclear metal complexes.
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