Molecular Orbital Theory and Hyperfine Splitting in Electron Spin Resonance Spectra of Semiquinones

1961 ◽  
Vol 34 (4) ◽  
pp. 1333-1343 ◽  
Author(s):  
Gershon Vincow ◽  
George K. Fraenkel
Keyword(s):  
Electron Spin Resonance ◽  
Molecular Orbital ◽  
Electron Spin ◽  
Hyperfine Splitting ◽  
Molecular Orbital Theory ◽  
Orbital Theory ◽  
Spin Resonance

Electron resonance studies of transition metal oxyions, I. Experimental results for the manganate, hypomanganate and ferrate ions

1960 ◽  
Vol 254 (1276) ◽  
pp. 101-110 ◽  
Keyword(s):  
Electron Spin Resonance ◽  
Transition Metal ◽  
Single Crystals ◽  
Molecular Orbital ◽  
Electron Spin ◽  
Potassium Chromate ◽  
Tetrahedral Structure ◽  
Spin Hamiltonians ◽  
Spin Resonance ◽  
Qualitative Nature

Detailed electron spin resonance studies of single crystals of potassium chromate containing manganate and ferrate ions and of potassium orthovanadate containing hypom anganate ions are described and the appropriate spin Hamiltonians are determined. The results confirm the tetrahedral structure of these ions and the assignation of spin S = 1 to ferrate and hypomanganate. A discussion of the qualitative nature of the results shows that the unpaired electrons in these ions occupy a doubly degenerate molecular orbital.

Correlation of optical and electron spin resonance spectra for alkali metal solutions in ethylamine and tetrahydrofuran

1976 ◽  
Vol 54 (19) ◽  
pp. 3110-3113 ◽  
Author(s):  
R. Catterall ◽  
J. Slater ◽  
W. A. Seddon ◽  
J. W. Fletcher
Keyword(s):  
Electron Spin Resonance ◽  
Optical Absorption ◽  
Alkali Metal ◽  
Electron Spin ◽  
Hyperfine Splitting ◽  
Pulse Radiolysis ◽  
Optical Absorption Spectra ◽  
Monomeric Species ◽  
Spin Resonance ◽  
Sodium Tetraphenylboron

The band maxima of transient optical absorption spectra observed by pulse radiolysis in ethylamine (EA)/tetrahydrofuran (THF) mixtures containing sodium tetraphenylboron are correlated with electron spin resonance (esr) hyperfine splitting constants obtained in potassium/EA/THF solutions. The data suggest that the optical spectra can be attributed to the same 'monomeric' species as observed by esr in alkali metal solutions.

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