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Volumn 44, Issue 3, 2005, Pages 438-441

An unprecedented bridging phenoxyl radical in dicopper(II) complexes: Evidence for an S = 3/2 spin state

Author keywords

Bridging ligands; Copper; EPR spectroscopy; Magnetic properties; Radicals

Indexed keywords

COMPLEXATION; COPPER; FERROMAGNETISM; MOLECULAR STRUCTURE; SOLVENTS;

EID: 12444300097     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200461462     Document Type: Article
Times cited : (40)

References (24)
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    • For reviews see: B. A. Jazdzewski, W. B. Tolman, Coord. Chem. Rev. 2000, 200-202, 633; S. Itoh, M. Taki, S. Fukuzumi, Coord. Chem. Rev. 2000, 198, 3; P. Chaudhuri, K. Wieghardt, Prog. Inorg. Chem. 2001, 50, 151.
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    • For reviews see: B. A. Jazdzewski, W. B. Tolman, Coord. Chem. Rev. 2000, 200-202, 633; S. Itoh, M. Taki, S. Fukuzumi, Coord. Chem. Rev. 2000, 198, 3; P. Chaudhuri, K. Wieghardt, Prog. Inorg. Chem. 2001, 50, 151.
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    • note
    • 2 = 0.0763 for all data. CCDC 245087 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 1EZ, UK; fax: (+44)1223-336-033; or deposit@ ccdc.cam.ac.uk).
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    • note
    • 3 did not afford the expected mononuclear copper(II) complex of HL. Instead, 2 was isolated in 40% yield.
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    • note
    • +.
  • 12
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    • note
    • +: 531 (330), 880 (210).
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    • + Hammet constant is observed for related compounds (Figure S8 in the Supporting Information). Moreover, the UV/Vis feature of the oxidized species matches well that reported for methoxyphenoxyl-copper(II) complexes (D. Zurita, I. Gautier-Luneau, S. Ménage, J.-L. Pierre, J. Biol. Inorg. Chem. 1997, 2, 46; Y. Shimazaki, S. Huth, S. Hirota, O. Yamauchi, Inorg. Chim. Acta 2002, 331, 168). This further confirms that the one-electron electrochemical process is ligand-based rather than metal-based.
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    • Zurita, D.1    Gautier-Luneau, I.2    Ménage, S.3    Pierre, J.-L.4
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    • + Hammet constant is observed for related compounds (Figure S8 in the Supporting Information). Moreover, the UV/Vis feature of the oxidized species matches well that reported for methoxyphenoxyl-copper(II) complexes (D. Zurita, I. Gautier-Luneau, S. Ménage, J.-L. Pierre, J. Biol. Inorg. Chem. 1997, 2, 46; Y. Shimazaki, S. Huth, S. Hirota, O. Yamauchi, Inorg. Chim. Acta 2002, 331, 168). This further confirms that the one-electron electrochemical process is ligand-based rather than metal-based.
    • (2002) Inorg. Chim. Acta , vol.331 , pp. 168
    • Shimazaki, Y.1    Huth, S.2    Hirota, S.3    Yamauchi, O.4
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    • This is evident in the CV curve from an irreversible anodic signal (corresponding to the oxidation of the bridging phenolato moiety) associated, in the reverse scan, with a cathodic peak which is observed ca. 0.3 V lower, that is, at a potential value similar to that of the nonbridging phenoxyl/phenolato couple: See F. Michel, F. Thomas, S. Hamman, E. Saint-Aman, C. Bucher, J.-L. Pierre, Chem. Eur. J. 2004, 10, 4115.
    • (2004) Chem. Eur. J. , vol.10 , pp. 4115
    • Michel, F.1    Thomas, F.2    Hamman, S.3    Saint-Aman, E.4    Bucher, C.5    Pierre, J.-L.6
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    • note
    • .+ due to its low stability.
  • 19
    • 12444287141 scopus 로고    scopus 로고
    • note
    • .+ measured at 215 K lacks most of the transitions associated with the quartet. It still exhibits a signal at g = 2.06 that could be attributed to an excited (S = 1/2) state, indicating that the exchange constant J is weak.
  • 22
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    • E. Beer, J. Daub, C. Palivan, G. Gescheidt, J. Chem. Soc. Perkin Trans. 2 2002, 1605; D. A. Schultz, R. K. Kumar, J. Am. Chem. Soc. 2001, 123, 6431.
    • (2001) J. Am. Chem. Soc. , vol.123 , pp. 6431
    • Schultz, D.A.1    Kumar, R.K.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.