Magnetic exchange interactions in transition metal dimers. V. Copper(II)-diethylenetriamine complexes with oxalate, cyanate, thiocyanate, and azide inner- and outer-sphere bridging units. Electron paramagnetic resonance of alkali halide pelleted copper complexes

1975 ◽  
Vol 14 (8) ◽  
pp. 1956-1964 ◽  
Author(s):  
Gretchen R. Hall ◽  
D. Michael. Duggan ◽  
David N. Hendrickson
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Transition Metal ◽  
Alkali Halide ◽  
Copper Complexes ◽  
Exchange Interactions ◽  
Outer Sphere ◽  
Magnetic Exchange ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

scholarly journals Copper Complexes of Benzoylacetone Bis-Thiosemicarbazones: Metal and Ligand Based Redox Reactivity

2021 ◽  
Vol 74 (1) ◽  
pp. 34 ◽  
Author(s):  
Jessica K. Bilyj ◽  
Jeffrey R. Harmer ◽  
Paul V. Bernhardt
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Cyclic Voltammetry ◽  
Copper Complexes ◽  
Atmospheric Oxygen ◽  
The Other ◽  
Oxidation Reactions ◽  
Paramagnetic Resonance ◽  
Time Resolved ◽  
Vis Spectroscopy ◽  
Electron Paramagnetic

Bis-thiosemicarbazones derived from the β-diketone benzoylacetone (H3banR, R=Me, Et, Ph) are potentially tetradentate N2S2 ligands whose coordination chemistry with copper is reported. In the absence of oxygen and in the presence of base they form anionic CuII complexes of the fully deprotonated ligands [CuII(banR)]–. Upon exposure to atmospheric oxygen they undergo a complex series of reactions leading to two types of products; one a ligand oxidised ketone complex [CuII(banRO)] and the other an unprecedented dimeric di-CuIII complex [(CuIII(banR))2] depending on the R substituent. Time-resolved UV-vis spectroscopy, cyclic voltammetry, spectroelectrochemistry, and electron paramagnetic resonance (EPR) spectroscopy have been used to identify intermediates on the way to stable products formed under both anaerobic and aerobic conditions. It is found that both ligand-centred and Cu-centred oxidation reactions are occurring in parallel leading to this unusually complicated mixture of products.

Electron Paramagnetic Resonance Spectroscopic (EPR) Study of Copper Amine Treated Southern Pine in Wood Preservation

Holzforschung ◽  
2000 ◽  
Vol 54 (4) ◽  
pp. 343-348 ◽  
Author(s):  
J. Zhang ◽  
D. P. Kamdem
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Copper Complexes ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Treated Wood ◽  
Wood Preservation ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Electronic Parameters ◽  
Electron Paramagnetic ◽  
Copper Amine

Summary The structure of copper complexes in copper amine treated wood samples were elucidated by the application of electron paramagnetic resonance spectroscopy (EPR). EPR axial spectra were observed for all Cu-amine treated samples irrespective of the formulations. The values of A∥ and g∥ of the axial spectra indicate that the stereo-structure of copper complexes in copper amine treated wood was either tetragonal-based octahedral or square-based pyramidal. Comparison of electronic parameters of A∥ and g∥ in Cu-amine treated wood with those of the Cu-amine treating solution and the values in literature suggests that the interaction of wood with copper amine is through complexation in which wood functional groups are complexed with copper amine perpendicularly. The copper complexes in both treating solution and treated wood are in the form of CuN2O2, where copper is ligated with 2 nitrogen and 2 oxygen.

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