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Volumn 130, Issue 28, 2008, Pages 9099-9105

Diarylnitroxide diradicals: Low-temperature oxidation of diarylamines to nitroxides

Author keywords

[No Author keywords available]

Indexed keywords

AROMATIC COMPOUNDS; CHEMICAL OXYGEN DEMAND; DICHLOROMETHANE; ELECTRON RESONANCE; MAGNETIC FIELDS; MAGNETIC MATERIALS; NITROGEN OXIDES; NUCLEAR MAGNETIC RESONANCE; OXIDATION; PARAMAGNETIC RESONANCE; QUANTUM INTERFERENCE DEVICES; QUANTUM THEORY; RESONANCE; SQUIDS; SUPERCONDUCTING MAGNETS;

EID: 47349084125     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja8016335     Document Type: Article
Times cited : (37)

References (59)
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    • Intermolecular antiferromagnetic interactions, which can be relatively strong, can lead to magnetic ordering in the presence of significant magnetic anisotropy at temperatures as high as 36 K but providing materials with very small magnetic moments ("weak ferromagnets") Banister, A. J.; Bricklebank, N.; Lavender, I.; Rawson, J. M.; Gregory, C. I.; Tanner, B. K.; Clegg, W.; Elsegood, M. R. J.; Palacio, F. Angew. Chem., Int. Ed. Engl. 1996, 35, 2533-2535.
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    • In the original synthesis of radical 1, the yield of 70% from the corresponding amine, using Na2WO4/H2O 2, was reported, though purity of 1 was not established
    • 2, was reported, though purity of 1 was not established.
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    • Several examples of diarylnitroxides with ferromagnetic exchange coupling in the solid state were reported, and the strength of coupling was generally weak. Seino, M, Akui, Y, Ishida, T, Nogami, T. Synth. Met. 2003, 133-134, 581-583
    • Several examples of diarylnitroxides with ferromagnetic exchange coupling in the solid state were reported, and the strength of coupling was generally weak. Seino, M.; Akui, Y.; Ishida, T.; Nogami, T. Synth. Met. 2003, 133-134, 581-583.
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    • p is somewhat lower.
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    • 1H-resonance at +10 ppm was assigned to the t-Bu groups in the 4-tert-butylphenyls adjacent to the radicals, suggesting analogous homohyperconjugation: Rajca, S.; Rajca, A. J. Am. Chem. Soc., 1995, 117, 9172-9179.
    • 1H-resonance at +10 ppm was assigned to the t-Bu groups in the 4-tert-butylphenyls adjacent to the radicals, suggesting analogous homohyperconjugation: Rajca, S.; Rajca, A. J. Am. Chem. Soc., 1995, 117, 9172-9179.
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    • 3), where |D| is in mT and r is in Å.
    • 3), where |D| is in mT and r is in Å.
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    • In the spectral simulation of 2 in Figure 5, it is assumed that the magnetic dipole-dipole inter-spin vector (principal axis of the diradical D-tensor) is along a principal axis of the nitroxide g- and A-tensor. Out-of-plane distortion in 2 may misalign the principal axes, and thus the value of |Ayy/hc| with the y-axis defined by the D-tensor in the spectral simulation would be lower, underestimating the actual value of |A yy/hc| with the y-axis parallel to the 2p N orbital axis
    • N orbital axis.
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    • s ≈ 0.7, which is in agreement with S = 1/2-1 obtained from the curvature of Brillouin plots (Figure S5B, Supporting Information),
    • s ≈ 0.7, which is in agreement with S = 1/2-1 obtained from the curvature of Brillouin plots (Figure S5B, Supporting Information),
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    • -1 only, thus the singlet geometries of were not optimized. This may introduce an additional, though small, source of overestimate of the singlet-triplet gaps.
    • -1 only, thus the singlet geometries of were not optimized. This may introduce an additional, though small, source of overestimate of the singlet-triplet gaps.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.