ChemInform Abstract: EPR SPECTRA AND STRUCTURE OF SOME PHOSPHORUS-CONTAINING NITROXYL RADICALS

1976 ◽  
Vol 7 (4) ◽  
pp. no-no
Author(s):  
A. V. IL'YASOV ◽  
YA. A. LEVIN ◽  
A. SH. MUKHTAROV ◽  
M. S. SKOROBOGATOVA
Keyword(s):  
Nitroxyl Radicals ◽  
Epr Spectra ◽  
Phosphorus Containing

EPR spectra and structure of certain phosphorus-containing nitroxyl radicals

1976 ◽  
Vol 11 (5) ◽  
pp. 515-520 ◽  
Author(s):  
A. V. Il'yasov ◽  
Ya. A. Levin ◽  
A. Sh. Mukhtarov ◽  
M. S. Skorobogatova
Keyword(s):  
Nitroxyl Radicals ◽  
Epr Spectra ◽  
Phosphorus Containing

Metal-nitroxyl interactions. 52. EPR spectra of nitroxyl radicals coordinated to manganese(III) tetraphenylporphyrin via the nitroxyl oxygen

1987 ◽  
Vol 26 (16) ◽  
pp. 2618-2620 ◽  
Author(s):  
Kundalika M. More ◽  
Gareth R. Eaton ◽  
Sandra S. Eaton
Keyword(s):  
Nitroxyl Radicals ◽  
Epr Spectra

Shape of the EPR spectra of nitroxyl radicals in solvating mixtures

1977 ◽  
Vol 13 (2) ◽  
pp. 141-145
Author(s):  
L. I. Antsiferova ◽  
N. N. Korst ◽  
A. N. Ivanova ◽  
N. S. Nazemets
Keyword(s):  
Nitroxyl Radicals ◽  
Epr Spectra

Pt(II)-, Pd(II)-und Cu(II)-Komplexe mit dem 4.4.5.5-Tetramethylimidazolin-1-oxyl-2-m-pyridyl-3-oxid-Liganden / Pt(II), Pd(II) and Cu(II) Complexes with the Ligand 4,4,5,5-Tetramethylimidazohne-1-oxyl-2-m-pyridyl-3-oxide

1981 ◽  
Vol 36 (2) ◽  
pp. 195-197 ◽  
Author(s):  
Karl E. Schwarzhans ◽  
Alfons Stuefer
Keyword(s):  
Free Radical ◽  
Magnetic Moments ◽  
Nitroxyl Radicals ◽  
Epr Spectra ◽  
Stable Free Radical

Abstract The stable free radical 4,4,5,5-tetramethylimidazoline-1-oxyl-2-m-pyridyl-3-oxide has been prepared and used as a ligand in platinum(II), palladium(II) and copper(II) complexes. The magnetic moments and the EPR spectra of the complexes and the free radical have been investigated. The complexes show a considerable interaction between the nitroxyl radicals of the ligands.

Kupfer(II)-Komplexe mit dia- und paramagnetischen Carboxylatliganden / Copper(II) Complexes with Dia- and Paramagnetic Carboxylate Ligands

1980 ◽  
Vol 35 (1) ◽  
pp. 68-70 ◽  
Author(s):  
Richard Fedrigolli ◽  
Karl E. Schwarzhans
Keyword(s):  
Free Radicals ◽  
Magnetic Moments ◽  
Nitroxyl Radicals ◽  
Epr Spectra ◽  
Carboxylate Ligands ◽  
Cyclohexanecarboxylic Acid ◽  
Stable Free Radicals

Abstract The stable free radicals 4-carboxy-2,2,6,6-tetramethylpiperidinooxyl, 4-carboxy-methylene-2,2,6,6-tetramethylpiperidinooxyl, 4-carboxymethyl-2,2,6,6-tetramethylpipe-ridinooxyl and 3′-carboxy-2,2,6,6-tetramethylpiperidine-4-spiro-2′-oxirane-l-yloxyl have been prepared and used as ligands in copper(II) complexes. The magnetic moments and the EPR spectra of the complexes and the free radicals have been investigated and compared with complexes containing diamagnetic cyclohexanecarboxylic acid or cyclo -hexaneacetic acid ligands. One of the copper(II) complexes shows a considerable inter-action between the nitroxyl radicals of the ligands.

Electron Paramagnetic Resonance as a Probe of Conformational Flexibility in Cyclic Alkanes

1980 ◽  
Vol 34 (3) ◽  
pp. 268-275 ◽  
Author(s):  
Marsha J. Heinig ◽  
G. R. Eaton ◽  
S. S. Eaton
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Long Range ◽  
Hyperfine Coupling ◽  
Nitroxyl Radical ◽  
Nitroxyl Radicals ◽  
Epr Spectra ◽  
Paramagnetic Resonance ◽  
Cyclic Alkanes ◽  
Temperature Spectra ◽  
Electron Paramagnetic

Electron paramagnetic resonance (EPR) spectra of a homologous series of nitroxyl radicals derived from cyclic alkanones with 6 to 15 carbons in the ring have been obtained as a function of temperature. Long-range hyperfine coupling (0.7 to 2.2 G) was observed in the low-temperature spectra for rings with 6, 7, and 9 to 15 carbons. Deuteration of the 11- to 14-membered rings indicated that the long-range coupling was to one of the protons on the carbons adjacent to the point of attachment of the nitroxyl radical. For the 9- to 15-membered rings, there was a temperature region in which the hyperfine coupling decreased rapidly. This decrease is attributed to rapid conformational averaging on the EPR time scale. For the 12-, 13-, and 15-membered rings, the high temperature spectra exhibited resolved hyperfine coupling which can be computer-simulated, assuming four equivalent protons. The activation energies estimated from the coalescence temperatures in the EPR spectra fall in the range estimated by nuclear magnetic resonance and show similar influences of ring size on rigidity.

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