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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis, Crystal Structure and Magnetic Properties of Indium(III) Diphthalocyanine (1995)
    s.l. : American Chemical Society
    Inorganic chemistry 34 (1995), S. 3505-3508 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00117a020
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and properties of binuclear nitride-bridged iron octaphenyltetraazaporphyrin. E.p.r. studies of dioxygen adduct formation (1989)
    Springer
    Transition metal chemistry 14 (1989), S. 341-346 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The synthesis and characterization are reported for (μ-nitrido)bis[(octaphenyltetraazaporphyrinato)iron] ([OPTAP)Fe]2N). The [(OPTAP)Fe]2N dimer is paramagnetic with one unpaired electron per dimer unit and shows a typical axially symmetric e.p.r. spectrum in non-polar solvents at liquid N2 temperature (g⊥=2.126, g‖=2.001), with well-resolved superhyper-fine splitting resulting from the μ-nitrido bridge (A ⊥ N =2.48mT, A ‖ N =2.60mT). A pyridine monoadduct of [(OPTAP)Fe]2N, formed in frozen glasses has been characterised by changes in e.p.r. spectra. Electronic spectra show no pyridine adduct formation at 298 K. Mössbauer parameters (IS=−0.042 mm/s, QS=1.769mm/s at 298K) are indicative of the predominant iron(IV) character in [(OPTAP)Fe]2N. The pyridine monoadduct binds O2 reversibly. The O2 adduct was characterized by e.p.r. spectroscopy (g1=2.062, g2=2.007, g3=2.000). O2 titration as monitored by e.p.r. shows that the adduct stoichiometry is one O2 per dimer. A spin-pairing model for O2 binding accounts for the observed O2-[(OPTAP)Fe]2N interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01032506
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  • 3
    Electronic Resource
    Electronic Resource
    31P Hyperfine interaction in a new type of phosphorus-containing iminoxy free radicals. An ESR study (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 163-168 
    Details
    ISSN: 0749-1581
    Keywords: ESR ; Iminoxy radicals ; Diethyl phosphonate ; 31P hyperfine interaction ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Iminoxy radicals of a new type, having the general formula RC(=NO·)P(O)(OEt)2, were synthesized and characterized by means of ESR spectroscopy. The presence of two isomers due to the different position of the C=NO· fragment with respect to the R substituent and the P atom, and the relative stability of the isomers, was established. The influence of the R substituent on the relative population of the isomers was found. The nitrogen hyperfine constants for the isomers differ by about 10%, while the phosphorus hyperfine constant for the less populated isomer is about six time greater, reaching a value of 60 G. A linear correlation was found between the values of this hyperfine constant and Dimroth-Reichardt ET(30)solvent parameters. The solvent dependence of the 31P hyperfine constant was shown to be stronger than the dependence found for the 14N hyperfine constant of nitroxides and iminoxyls.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260300213
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  • 4
    Electronic Resource
    Electronic Resource
    Reactions of silver(II) complexes with ketoxime, nitroso and isonitroso compounds: ESR spectroscopy of the radicals formed (1989)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 27 (1989), S. 130-133 
    Details
    ISSN: 0749-1581
    Keywords: ESR ; Iminoxy radicals ; Nitroxides ; Silver(II) complexes ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of silver(II) complexes with ketoxime, nitroso and isonitroso compounds in organic solvents were investigated by ESR. The oxidation yielded iminoxy radicals RR′C=NO· and/or nitroxides R1R2NO·. The silver(II) complexes with nitrogen ligands (mono-, bi- and tri-dentate) and AgO were used as oxidizing agents. The reaction products were analysed on the basis of the ESR spectra. The signs of the 14N hyperfine constants for the radicals were determined using the ESR spectra in an MBBA liquid nematic crystal as solvent. A linear correlation was found between the hyperfine 14N parameters and the Dimroth-Reichardt ET(30) coefficients for the iminoxy radicals.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260270207
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