Carbonyl halides of the Group VI transition metals. VIII. Paramagnetic and diamagnetic dicarbonyl derivatives of molybdenum(II)

1968 ◽  
Vol 21 (5) ◽  
pp. 1155 ◽  
Author(s):  
R Colton ◽  
CJ Rix
Keyword(s):  
Electron Spin Resonance ◽  
Transition Metals ◽  
General Formula ◽  
Electron Spin ◽  
Group Vi ◽  
Spin Resonance ◽  
Derivatives Of

Complexes of the general formula Mo(CO)2L2X2 (L = pyridine (py), 2,2'- dipyridyl (dipy), 1,l0-phenanthroline (phen); X = Cl, Br) have been isolated. The pyrldine derivatives are yellow monomeric compounds which are paramagnetic, but the complexes with dipy and phen contain diamagnetic seven-coordinate cations and are correctly formulated as [Mo(CO)2L2X]+X-. Conductance, infrared, magnetic, and electron spin resonance studies have been carried out.

Free Radical Studies by Electron-Spin Resonance of Some Derivatives of Phenothiazine

1962 ◽  
Vol 51 (7) ◽  
pp. 694-695 ◽  
Author(s):  
David W. Schieser ◽  
L. Dallas Tuck
Keyword(s):  
Electron Spin Resonance ◽  
Free Radical ◽  
Electron Spin ◽  
Spin Resonance ◽  
Derivatives Of

The electron spin resonance spectra and structures of some aluminium derivatives of 3,6-di-t-butyl-1,2-benzoquinone

1982 ◽  
Vol 229 (3) ◽  
pp. 215-222 ◽  
Author(s):  
Alwyn G. Davies ◽  
Zbigniew Florjańczyk ◽  
Ewa Lusztyk ◽  
Janusz Lusztyk
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
Derivatives Of

Nitroxide derivatives of acetylacetone as spin-labelled ligands

1981 ◽  
Vol 59 (1) ◽  
pp. 156-163 ◽  
Author(s):  
D. Plancherel ◽  
D. R. Eaton
Keyword(s):  
Electron Spin Resonance ◽  
Metal Complex ◽  
Electron Spin ◽  
Hyperfine Coupling ◽  
Esr Spectra ◽  
Enol Form ◽  
Coupling Constants ◽  
Spin Resonance ◽  
Steric Factors ◽  
Derivatives Of

Electron spin resonance spectra are reported from a number of radicals derived from 2,4-pentadione substituted at the 3 position with nitroxide-containing groups. If the substituent is t-butyl nitroxide no metal complexes are formed. This is attributed to steric factors which prevent the formation of the enol form of the β-diketone. If the substituent is trifluoromethyl nitroxide two types of metal complex have been observed. The esr spectra of the first type are very similar to that of the uncomplexed radical. Such complexes are formed with Co(III) and Al(III). The esr spectra of the second type show considerably increased 14N and 19F hyperfine coupling constants and in some cases large couplings to the metal nucleus. Complexes for the second type have been observed with Pd(II), Pt(II), and Rh(III). The possible structures of these radicals are discussed.

The electron spin resonance spectra and structures of organotin derivatives of 3,6-di-t-butyl-1,2-benzosemiquinone

1983 ◽  
Vol 251 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Alwyn G. Davies ◽  
Jalal A.-A. Hawari
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
Derivatives Of

921. Structure and reactivity of the oxy-anions of transition metals. Part II. Investigations by electron-spin resonance

1956 ◽  
pp. 4710 ◽  
Author(s):  
A. Carrington ◽  
D. J. E. Ingram ◽  
D. Schonland ◽  
M. C. R. Symons
Keyword(s):  
Electron Spin Resonance ◽  
Transition Metals ◽  
Electron Spin ◽  
Spin Resonance
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