Paramagnetic Resonance of a Cu<sup>2+</sup>Ion in a Tetrahedral Crystal Field

Bates, C A; Moore, W. S.; Standley, K J; Stevens, K W H

doi:10.1088/0370-1328/79/1/311

Cited by 103 publications

(24 citation statements)

References 12 publications

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“…The ESR spectrum for the complex [Cu 2 (C 30 H 28 N 6 O 2 )(SO 4 ) 2 ] as a powder, at room temperature, is presented in Figure 4. The {g} tensor values, g 1 = 2.088 and g 2 = 2.406, confirm the T d symmetry [20][21][22][23]. As noted, the spectrum does not present interactions that would indicate a hyperfine structure.…”

Section: Electronic Spectrasupporting

confidence: 59%

See 1 more Smart Citation

Copper(II) Complexes with Ligands Derived from 4-Amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one: Synthesis and Biological Activity

et al. 2006

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Section: Electronic Spectrasupporting

confidence: 59%

“…The lack of hyperfine structure or the presence of very small hyperfine splitting for the Cu 2+ ion in T d or lower symmetry were explained by C.A. Bates et al, by mixing the 4p z orbital of the metallic ion with the 3d xy orbital which defines the fundamental state [20]. (a) (b)…”

Section: Electronic Spectramentioning

confidence: 99%

Copper(II) Complexes with Ligands Derived from 4-Amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one: Synthesis and Biological Activity

et al. 2006

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“…The value of ]AI,I observed in the present experiments is among the lowest observed for low molecular weight systems that contain copper (see also Sharnoff [16] and Bates et al [17]). The presence of ligand hyperfine structure in the g = 2.3 region of the spectrum indicates covalent binding of the Cu2+ to the ligand atoms, in this case the nitrogen atoms of the four CH,CN molecules.…”

Section: In the Crystals Containingsupporting

confidence: 37%

Cu2+ in Non Axial-Field: A Model for Cu2+ in Copper Enzymes

Gould

Ehrenberg

1968

Eur J Biochem

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By y-irradiation a t 77" K of the Cul'-containing organic crystals, Cu(CH,CN),C10,, Cu(HOOCCH,CH,CN),C10,, and Cu(CH,CN),BF,, Cu2' centres in near-tetrahedral field were produced. These Cu2+ centres approximated the electron spin resonance characteristics ( IAl; 1 . = 0.008 cm-l) and light absorption of Cu2+ in Cu-containing oxidoreductases. No exact correlation was found between the g-values of the model system and the Cu-oxidases. It is suggested that the Cu site in these enzymes is intermediate between the square planar (normal for Cu2+) and the tetrahedral (normal for Cul+) configuration, which makes it suited for rapid electron transport.

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“…1 (24)(25)(26). This picture is not contradicted by x-ray absorption edge spectroscopy (27), and the 14N ENDOR can be interpreted as providing additional support.…”

Section: Resultsmentioning

confidence: 76%